Young adults' reactions to breastfeeding images were assessed using varied approaches. In Study 1, participants viewed posters from a breastfeeding campaign; many anticipated negative reaction to the campaign. In Study 2, participants viewed novel infant-feeding posters; breastfeeding posters were viewed for less time than bottle-feeding posters, regardless of the task assigned. In Study 3, participants were asked to rate their comfort level viewing infant-feeding images; greater discomfort was reported for breastfeeding images. Taken together, we argue that many young adults expect, and experience, discomfort viewing breastfeeding, but it is important to continue using breastfeeding images in promotion efforts.
Young adults' reactions to breastfeeding images were assessed using varied approaches. In Study 1, participants viewed posters from a breastfeeding campaign; many anticipated negative reaction to the campaign. In Study 2, participants viewed novel infant-feeding posters; breastfeeding posters were viewed for less time than bottle-feeding posters, regardless of the task assigned. In Study 3, participants were asked to rate their comfort level viewing infant-feeding images; greater discomfort was reported for breastfeeding images. Taken together, we argue that many young adults expect, and experience, discomfort viewing breastfeeding, but it is important to continue using breastfeeding images in promotion efforts.
The composition of breast milk is thought to provide optimal nutrition for an infant
and can benefit the health of both the infant and mother (see Horta and Victora,
2013; Victora et al.,
2016); it is recommended by both the World Health Organization (WHO)
and Health Canada to be given exclusively to infants for the first 6 months of
life, with breastfeeding continuing for up to 2 years after (Health Canada, 2014; WHO, 2013). Although
breastfeeding initiation rates tend to be high overall across the United States
(75%; National Center for
Chronic Disease Prevention and Health Promotion, 2014) and Canada
(89%; Gionet, 2013),
breastfeeding duration rates are considerably lower; the rate of exclusive
breastfeeding at 6 months is only 18.8 percent in the United States and 26 percent
in Canada. The WHO aims to increase exclusive breastfeeding rates to 50 percent by
the year 2025 (WHO,
2014). To do this, it is necessary to address the many factors that
influence whether, and for how long, a mother breastfeeds; factors include, but
are not limited to, various socio-demographic barriers (e.g. limited education,
unemployment, and low socioeconomic status), problems with breastfeeding (e.g.
perception of low milk supply, inconvenience, and fatigue), return to work,
intentions to breastfeed, breastfeeding self-efficacy, and adequate breastfeeding
supports (e.g. Brown et al., 2013; Emmanuel, 2015; Li et al., 2008; Meedya et al., 2010).The marketing of formula in general, and the direct marketing of formula to mothers,
can also impact breastfeeding rates (e.g. Rosenberg et al., 2008; Zhang et al., 2013).
Zhang et al. (2013)
found that, in a sample of over 3000 mothers, mothers reported greater overall
media exposure to information about formula than about breastfeeding; exposure to
formula through print and/or online media had a negative impact on duration of
breastfeeding intentions and on actual breastfeeding initiation, respectively. In
a focus group of mothers who chose to formula feed their infants, most mothers
felt that formula was “just as good as or better than breast milk” (Bonia et al., 2013: 4),
and that it was more convenient because feedings could be shared with others (e.g.
partners could participate in feeding), giving the mother her independence.
Mothers also reported being uncomfortable about the idea of breastfeeding in
public; the view that one would have to breastfeed in private or cover up while
breastfeeding also contributed to the perception that formula feeding was more
convenient.Given the many barriers to breastfeeding, the appeal of formula, and the many factors
that positively influence whether a mother breastfeeds, the WHO’s goal of
increasing the breastfeeding duration rate will require a myriad of solutions and
approaches (e.g. reducing inequalities and ensuring access to care, improving
breastfeeding supports at all levels, and increasing the scope of breastfeeding
promotion efforts). Expanding the scope of breastfeeding promotion is the focus of
this research.
Breastfeeding promotion through the lens of the Theory of Planned
Behavior
The Theory of Planned Behavior (e.g. Ajzen, 1991) suggests that whether
an individual engages in a behavior (e.g. breastfeeding), depends on factors
such as their intention to engage in the behavior, their
attitudes toward the behavior, and the
subjective norms for that behavior (e.g. do people
support the behavior, is there pressure to engage in the behavior?). In the
context of breastfeeding, for example, mothers who report the intent to
breastfeed are more likely to initiate breastfeeding, and breastfeeding
duration is greater among those with higher intentions (e.g. Donnan et al.,
2013; Meedya et al., 2010). Furthermore, mothers who reported an
intention to breastfeed for 12 months or more were less likely to
discontinue early (DiGirolamo et al., 2005). Breastfeeding intentions are higher
among those individuals who believe that they can breastfeed successfully,
have a positive attitude toward breastfeeding, who believe that
breastfeeding is socially acceptable, and who believe that others support
the decision to breastfeed (e.g. Cabieses et al., 2014; Giles et al.,
2014; Mitchell-Box et al., 2013; Mutuli and Walingo, 2014; Swanson and Power,
2005). Cabieses et al. (2014), for example, reported that an
intention to engage in mixed-feeding (a combination of bottle-feeding and
breastfeeding) was predicted by the reported perception of bottle-feeding or
mixed feeding as the social norm.Unfortunately, negative media coverage of breastfeeding can become an obstacle
for improving breastfeeding rates since it can influence perceptions of
subjective norms for the behavior. Research suggests that when breastfeeding
is represented in film or television programming, for example, it is often
presented as being problematic relative to bottle-feeding (e.g. Foss, 2012; Henderson et al.,
2000; Potter et al., 2000). Similarly, many news articles that
reference breastfeeding tend to highlight individual cases where
breastfeeding mothers were asked to cover up or to leave a public location,
suggesting that breastfeeding in public is unacceptable (e.g. CBC News, 2014;
Judd,
2015). Where there is uncertainty about how others will respond to
seeing breastfeeding, or where bottle-feeding is perceived as the social
norm, breastfeeding initiation and duration rates suffer (e.g. Avery and Magnus,
2011; Bonia
et al., 2013; Forster and McLachlan, 2010;
Leeming et al.,
2013; Meng
et al., 2013; Scott and Mostyn, 2003).Given that young adults are frequent consumers of mass media content (e.g.
Lenhart,
2015), a negative media portrayal of breastfeeding could
negatively impact this demographic’s views on breastfeeding. Ensuring that
this demographic sees positive examples of breastfeeding is particularly
important since decisions about whether to breastfeed are made early on,
even before individuals have children (e.g. Fairbrother and Stanger-Ross,
2010; Kavanagh et al., 2012; Leffler, 2000; Tarrant and Dodgson,
2007). Furthermore, exposure to breastfeeding is linked to more
positive attitudes toward breastfeeding (including public breastfeeding) and
a greater intent to breastfeed one’s own child (e.g. Goulet et al., 2003; Marrone et al.,
2008; Tarrant and Dodgson, 2007; c.f. Vari et al., 2013). To date,
however, little is known about how young adults react when they are exposed
to breastfeeding. While using breastfeeding images to promote breastfeeding
may be one way to help counteract any negative media coverage of
breastfeeding and to positively influence the perceived social norms around
breastfeeding (see Giles
et al., 2014), the impact of these efforts could be weakened if
viewers respond negatively to seeing breastfeeding. Thus, it is important to
assess young adults’ reactions to being exposed to breastfeeding or
breastfeeding images.
Young adults’ reactions to breastfeeding
Much of what we know about how young adults react to seeing breastfeeding is
through survey data assessing opinions about breastfeeding in public, and
from responses to hypothetical scenarios (Acker, 2009; Kavanagh et al., 2012; Spurles and Babineau,
2011). From such data, it is clear that anticipated reactions
to seeing breastfeeding are largely negative among young adults. In a sample
of university students from the Southeast United States, for example,
67.8 percent of those surveyed reported that breastfeeding in public was
unacceptable behavior, and 77.7 percent reported that it should only be done
in private because it was an act of intimacy (Spear, 2007). Close to half of a
sample of students surveyed from a Nursing program within the same region
felt that women should not breastfeed in public (Spear, 2006). More recently,
71.0 percent of female and 47.7 percent of male undergraduate students,
sampled from the University of Tennessee, indicated that public
breastfeeding is embarrassing and unacceptable (Kavanagh et al., 2012). The
majority of university-educated focus group participants in Eastern Canada
also shared the view that public breastfeeding had to be done discreetly, or
in designated areas, for it to be acceptable (Spurles and Babineau, 2011). In a
Midwestern university-based sample, both younger (students) and older
(faculty, staff, and administration) participants expressed neutral rather
than positive attitudes about the appropriateness of breastfeeding in public
locations (Vari et al.,
2013). Taken together, existing survey and focus group results
indicate that young adults tend to disapprove of public breastfeeding even
though they report being supportive of breastfeeding and are knowledgeable
about the benefits of breastfeeding (Forrester et al., 1997; Kavanagh et al.,
2012; Li et
al., 2002; McIntyre et al., 2001; Scott et al., 1997; Spear, 2007;
Spurles and
Babineau, 2011; Tarrant and Dodgson, 2007).One of the few studies to look at how young adults react to viewing a
photograph of a breastfeeding mother was a study published by Acker (2009). In
this study, a large sample of university students and older adults were
presented with a set of nine photographs and had to answer six questions
about the individual in the photo. The key manipulation was that one of the
photographs depicted a mother breastfeeding her infant; half of the
participants viewed a picture of a mother breastfeeding in private, while
the remaining participants saw a picture of a mother breastfeeding in
public. Evaluations were significantly more positive for the mother who
breastfed in private than in public, which suggest more negative attitudes
about the latter breastfeeding scenario. This interpretation is certainly
consistent with the survey data reviewed above. Since there was no
bottle-feeding photograph comparison, however, it is difficult to know how
reactions to seeing a picture of a breastfeeding mother compare to those of
seeing a bottle-feeding mother.Fairbrother and Stanger-Ross (2010) at least partially addressed this issue in
a study comparing female university students’ reactions to pictures of
breastfeeding versus bottle-feeding by having the participants evaluate an
infant-feeding picture as part of a larger study. Half of the participants
viewed a picture of a woman breastfeeding her infant while the other half
viewed a picture of the same woman bottle-feeding her infant. Participants
were given a list of positive-valence and negative-valence adjectives with
which to rate the picture. Participants who viewed the breastfeeding picture
assigned higher ratings on the positive-valence adjectives than those who
viewed the bottle-feeding picture. They also, however, reported less
positive attitudes toward public breastfeeding than public formula feeding,
suggesting limitations to their support for breastfeeding.More recently, Vieth et al.
(2015) tested the effectiveness of viewing a breastfeeding
poster campaign to improve comfort levels with breastfeeding. They recruited
a convenience sample of participants from a local shopping mall in two rural
communities in Newfoundland and Labrador, a region with low breastfeeding
rates. Participants completed a short survey to assess their comfort levels
with breastfeeding in public venues, and to assess awareness of the
campaign. Participants who reported not being aware of the campaign were
then shown the breastfeeding posters
and asked to study them for a brief time period. These participants
then completed a follow-up survey to assess whether viewing the posters
changed their reported comfort levels. The researchers reported a small
improvement in comfort level after seeing the posters. Although this is
promising data, the intervention was brief and may have encouraged a change
in response by asking participants to immediately reassess their comfort
levels after viewing the posters. Additionally, the study did not focus
specifically on young adults, who made up only a small proportion of the
participants.
The present research
Given the limited number of studies that directly assess how young adults react
to seeing breastfeeding, many questions remain unanswered. First, since
participants in these studies were not asked how they think
others would respond to seeing breastfeeding, it is
not easy to assess their perception of the subjective norms around
breastfeeding; this will be the focus of Study 1. Second, the studies look
at minor manipulations of a single photo or poster rather than reactions to
a range of breastfeeding and bottle-feeding photos, so there is a limit to
the conclusions that can be drawn from these studies. Finally, although it
is important to assess explicit reactions to breastfeeding
and breastfeeding pictures (e.g. survey responses), the outcome of this type
of assessment may be influenced by a social desirability bias, that is, a
bias to respond in a socially acceptable way (Van de Mortel, 2008). Thus, it is
equally important to assess reactions to both breastfeeding and
bottle-feeding pictures using implicit measures such as memory tests and eye
movements. Both of these latter two questions will be addressed using
different methodologies in Study 2 (implicit measures of eye movements,
memory tests) and Study 3 (explicit reaction to a range of infant-feeding
pictures). Thus, the aim of all three studies reported here is to assess
young adults’ reactions to seeing images of breastfeeding.
Study 1
In Study 1, we first assessed the breastfeeding intentions of a sample of young
adults attending university in Northeastern Nova Scotia, a region of the
province where breastfeeding rates are low (e.g. Brown et al., 2013). In this
study, we also assessed participants’ reactions to a former provincial
breastfeeding poster campaign. Doing so allowed us to establish a clear
picture of the perception of social norms around breastfeeding.
Methods
Recruitment approach and measures
All undergraduate students who were enrolled in an Introductory
Psychology course (approximately 750 students) at the
researchers’ institution were invited to complete a large paper
and pencil survey package during class time. Participation was
voluntary. Participants received partial course credit for
completing the surveys. This larger survey package included a
survey of basic demographic information and the two key survey
measures of interest. The first key measure was a forced-choice
measure of breastfeeding intentions that required participants
to indicate whether they wanted their own child to be breastfed.
The other measure involved showing participants a single image
of a former breastfeeding promotion poster series used in Nova
Scotia. The size of the image made it possible for participants
to clearly see the breastfeeding images used, as well as the
title of the poster series “Nova Scotia promotes, protects, and
supports breastfeeding!,” although the remainder of the poster
text was not legible. Participants were asked to provide a
written response to this poster campaign to indicate how they
anticipated others would react to seeing the posters.
Inclusion and exclusion criteria
The initial inclusion criterion used was that participants had to
be enrolled in Introductory Psychology and to be present in
class on the day that the larger survey package was distributed.
A total of 612 undergraduate Psychology students (463 females)
completed the larger survey package in exchange for partial
course credit. Ages of participants ranged from 17 to 58 years
(M = 18.79, standard
deviation (SD) = 2.92 years).
Since the focus of this study was on young adults, and the
majority (98%) of participants were between the ages of 17 and
23 years, responses from participants outside of this age range
were excluded from the analysis.
Participants
A total of 594 participants (455 females) met the criteria for
inclusion. The majority of participants (84.8%) were in their
first year of university, and over half of them originated from
Nova Scotia (58.8%). Ethnicity was not particularly diverse;
63.1 percent of the sample was Euro-Canadian, 1.9 percent
African-Canadian, 1.2 percent Aboriginal, .5 percent Asian, and
17.8 percent selected “Other,”
while .3 percent did not provide a response.
Procedure
Psychology course instructors informed potential participants in
advance that they would have the opportunity to complete a
package of surveys from various researchers within the
Psychology Department and that the survey packages would be
completed during a specified class period early in the academic
year. Upper-level psychology students assisted with the
distribution of the surveys in class and also collected the
surveys as participants returned them. Course instructors were
not in the classroom when the surveys were being completed. As
noted above, in addition to basic demographic information,
participants completed the two measures of interest for this
particular study. The Breastfeeding Intentions question asked
“Would you want your own child to be breastfed?” Participants
could select either a “yes” or “no” response to this question.
The Breastfeeding Social Norms questionnaire involved showing
participants a single image of a former breastfeeding promotion
poster series used in the province. The participants were given
a brief preamble about the purpose of the poster campaign (i.e.
to promote breastfeeding) and then they were asked the following
open-ended key question: “How do you think people will react to
these posters?” Participants were given space on the survey to
record their response.
Results and discussion
In response to the Breastfeeding Intentions question, 90.6 percent of
respondents indicated that “yes” they would want their own child to be
breastfed, while only 6.7 percent said “no,” and 2.7 percent did not
provide a response. Thus, intentions to breastfeed reported within
this group were very high. This measure, taken on its own, suggests
that messages around breastfeeding promotion must be reaching this
sample on some level. Furthermore, it indicates that attitudes toward
breastfeeding must be generally positive since the majority of
respondents plan to breastfeed. These findings are promising, given
that breastfeeding intentions predict behavior (e.g. Donnan et al.,
2013; Meedya et al., 2010). Intentions to breastfeed, however,
do not guarantee initiation or continued breastfeeding following
initiation. One’s perception of social norms around breastfeeding and
the perceived social acceptability of breastfeeding, among other
factors, also play a role (e.g. Cabieses et al., 2014).With respect to the Breastfeeding Social Norms questionnaire, which
assessed anticipation of the reaction that members of the general
public would have to the provincial breastfeeding poster campaign, 94
of 594 (15.8%) participants did not provide any response to this
question. It is difficult to interpret what this non-response means.
It may be that these participants did not feel that the questionnaire
was relevant to them because it depicted breastfeeding, or it could be
that they were uncomfortable seeing the breastfeeding image and chose
to skip this particular survey. A content analysis was conducted on
the remaining 500 participant responses. Because the goal of this
study was to capture how participants’ felt others would react to
seeing the breastfeeding poster campaign, two different raters
independently coded the overall valence of each response; responses
were coded as being generally positive, negative or mixed. By coding
responses, it was possible to assess the perceived social norms around
breastfeeding among this group of participants. Cohen’s
k was computed to assess the level of agreement
in the categorization of responses across the two raters. Agreement
between the raters was almost perfect (k = .831,
p < .0001); most disagreements between
raters typically involved use of the “negative” versus “mixed”
categories. After independently rating participant responses, the
reviewers met to discuss and resolve any discrepancies in their
ratings. The means reported below are based on these adjusted
ratings.Positive comments were those where the participant clearly anticipated a
positive response to the poster campaign or general acceptance of the
campaign. For example, one participant said, “I think people will
react normally to these posters because breastfeeding is important to
newborn babies and is natural among pregnant/new mothers.” Likewise,
another participant said, “I don’t think people [will] mind these
posters, it’s a part of life.” Negative comments were those where
participants clearly anticipated a negative public response to the
poster, or a response of disapproval. One participant said, “Not well,
people are going to think they are obscene and inappropriate,” while
another participant wrote,I think people will write nasty words like “slut or tramp” on
the poster and will not take the idea the poster is trying
to portray seriously, because the girl breastfeeding her
child looks very young—like 15! Also, boys are immature
and if they see a young woman (or an old woman) with her
breast almost fully exposed, they will take the poster the
wrong way and only focus on the body part not the message.
People will react to these posters but not in the way they
want them to react.Mixed responses were those that indicated either that some people would
react positively, while others would react negatively, or responses
that indicated that people would respond positively to one aspect of
the campaign (e.g. breastfeeding promotion), but not to other aspects
(e.g. breast exposure). One participant remarked, “Some people may
take offense to the posters, especially if they can’t breastfeed, but
mothers who have, they will be very supportive of the campaign.”
Another participant wrote, “I think for the most part they will be
accepted, but some people will find faults, like too much boob or if
the moms look young, they will say teen pregnancy is encouraged.”Of the 500 responses provided, the majority of responses were categorized
as mixed (n = 293; 58.6%).
Furthermore, more than twice as many responses were categorized as
being negative (n = 149; 29.8%)
compared to positive (n = 58;
11.6%). To gain further insight into these ratings, we assessed how
often the sight of the breast (i.e. breast exposure) was provided as a
reason for the anticipated negative or
mixed response. Interestingly, breast exposure
was frequently cited (i.e. cited within 248 or 56.1% of the negative
and mixed comments) as being one reason for the negative response to
the campaign.The results from this study paint an interesting picture. First, the
majority of respondents indicated that they want their future
child(ren) to be breastfed, which suggests that breastfeeding
intentions are high. When asked how the public would respond to seeing
a breastfeeding poster campaign that depicted breastfeeding, however,
the majority of respondents anticipated a negative or mixed response
to the campaign. This indicates that there is still a perception of
negative social norms around breastfeeding. Perceptions such as these
pose a potential barrier for any increase in breastfeeding duration
rates. Considering that almost half of the negative or mixed comments
included a reference to breast exposure, this strongly suggests that
breastfeeding in public is perceived as an issue and furthermore that
hyper-sexualization of the breast might be the underlying reason (see
Johnston-Robledo et al., 2007).Anticipated discomfort seeing breastfeeding is a barrier that needs to be
addressed in future efforts to promote breastfeeding. Given that,
within the media, breastfeeding is often represented as being
problematic relative to bottle-feeding (e.g. Foss, 2012; Henderson et al.,
2000), efforts should be made to ensure that positive
examples of breastfeeding are prominent in the media, and that the
public has ample opportunity to be exposed to breastfeeding (e.g.
promote breastfeeding friendly spaces to encourage breastfeeding
anytime and anywhere).In this study, young adults were asked how they thought
others would respond to seeing the
breastfeeding promotion poster; the response clearly indicated the
anticipation of a negative reaction from others. If young adults were
asked how they would react to seeing the poster
themselves, however, the response is likely to be more positive, but
it would be difficult to tease apart whether they actually felt
comfortable viewing the breastfeeding poster or whether they were
responding in a socially desirable way. One way around this issue is
to use an alternate measure of response to the poster. That is, rather
than ask participants to describe how they would react to seeing the
poster, it is possible to use a less conscious and controllable
measure to assess reaction, in this case, looking behavior and
reaction time.
Study 2
It is possible that a negative perception of social norms around breastfeeding,
and limited opportunities to see breastfeeding, could impact how young
adults look at and process any poster aimed at promoting breastfeeding. To
assess reactions to seeing breastfeeding, it would be ideal to use a measure
that is minimally susceptible to response bias. In Study 2, we used
eye-tracking technology to record looking behavior, while participants
viewed novel infant-feeding posters designed specifically for this study.
The posters included an infant-feeding picture paired with a brief
feeding-relevant slogan. The posters were presented in random order to
participants. Measuring eye movements provided an implicit measure on which
to compare how young adults view breastfeeding versus bottle-feeding;
differences in looking times could be compared across the two picture types.
Based on past eye movement research (e.g. Mogg et al., 2003; Rinck and Becker,
2006), and what is known about anticipated reactions to seeing
breastfeeding (e.g. Acker, 2009; Kavanagh et al., 2012; Spurles and Babineau,
2011), it was predicted that looking times would be shorter for
breastfeeding posters than for bottle-feeding posters since the former would
be more likely to elicit discomfort.Participants were assigned to complete one of three timed categorization tasks
designed to focus attention on the infant-feeding picture, the slogan, or
both. Using different types of tasks helped to vary the degree to which
participants were required to focus on the breastfeeding and bottle-feeding
images. We predicted that participants would be faster to complete
categorization tasks that required them to look at the image versus the
slogan, and faster when the poster they were looking at included a
breastfeeding image. Following the categorization task, participants were
given a surprise slogan recall and recognition task to assess memory for the
slogans. The unexpected memory test allowed us to determine whether the
ability to recall or recognize written information that was paired with the
image depended on the type of image viewed. We predicted that recall and
recognition of the slogans would be worse for slogans that were paired with
breastfeeding images.
Method
Recruitment approach
Upper-level psychology student researcher and second author (J.D.)
visited the classrooms of Introductory Psychology courses at the
researchers’ institution to recruit potential participants for
this study. After providing each class with a short verbal
description of the research project and what it entailed as a
participant, a sign-up sheet was circulated around the classroom
for interested participants.All students enrolled in Introductory Psychology were eligible to
participate in this study. A total of 99 student participants
(79 women, 20 men) visited the lab to participate in the study.
Since the main aim of this study was to determine whether there
are differences in how young adults view breastfeeding versus
bottle-feeding posters, and whether the type of poster viewed
can influence memory for the accompanying slogans, it was
critical to have looking data for each participant. Thus,
participants were excluded from the study if eye movement data
could not be collected, and/or if there was an issue with the
categorization data (e.g. not following task instructions).
Using these exclusion criteria, 27 participants were excluded
from the analysis; this was due to unexpected technical issues
(n = 1), confusion with task instructions
(n = 3), and incomplete or insufficient
eye movement data
(n = 23).In total, data were analyzed from 72 participants (55 females, 17
males), with 24 participants per categorization task (12
participants for each possible response mapping). Participants
received partial course credit for their participation.Participants were randomly assigned to complete one of three timed
categorization tasks involving infant-feeding posters presented
on an eye-tracker. Posters consisted of a breastfeeding or
bottle-feeding image paired with a slogan. The same posters were
used for each task. In the Picture Assessment
task, participants decided whether the picture
depicted breastfeeding or bottle-feeding. In the Slogan
Assessment task, participants decided whether the
tone of the slogan was positive or negative. And, in the
Slogan-Picture Appropriateness task,
participants decided whether the slogan was appropriate for the
picture with which it was paired. As soon as participants made a
decision, they responded by pressing one of two assigned
computer keys. Response times (RTs) were recorded for each task,
as well as looking time (as assessed through dwell times using
the eye-tracking equipment) within two defined poster areas, in
this case, the slogan versus the picture. Following the
completion of the categorization task, participants were asked
to complete two memory tests: slogan recall and slogan
recognition. Since participants were not told about these memory
tests at the outset of the study, the tests were unexpected, and
served as a way to assess passive intake of the slogans.
Accuracy for the memory tasks was recorded.Participants were seated approximately 60 cm from a Tobii
Eye-Tracking Device XL (60 Hz sample rate), on which the
infant-feeding posters were presented. Posters were displayed
for a minimum of 2000 ms (observation period) and remained on
display until participants responded.
Of the 40 posters, half included breastfeeding images and
the other half included bottle-feeding images. Images were
selected from those available on the Internet via search
engines, using the criteria that the breastfeeding and
bottle-feeding images were comparable to one another, the images
could be resized to one of two common sizes without distortion,
and that the racial diversity of moms and babies portrayed in
the images roughly matched the diversity of our potential
sample. All of these criteria helped to maximize the
generalizability of the results of this study. Of the 20
breastfeeding images selected, seven showed a close-up of the
baby on the breast with the mother being only partially visible,
while the remaining images showed both the mother and baby in
complete view. In 10 of the 20 breastfeeding images, the
mother’s breast was partially visible. Of the 20 bottle-feeding
images selected, seven showed a close-up of the baby being
bottle-fed with the view of the mother obscured, while the
remaining images showed both the mother and baby in complete
view. Some images naturally had a more horizontal orientation
(measuring 15.1 × 8.6 degrees of visual angle) than others
(measuring 11.6 × 9.7 degrees of visual angle). Below each image
was a slogan typed in white Times New Roman font and presented
on a black background. A total of 20 unique slogans were used,
where each slogan was paired with two different infant-feeding
images (either two different breastfeeding images or two
different bottle-feeding images). Some slogans were positively
framed (e.g. Off to the best start, Healthy eating for a healthy
mind), while others were negatively framed (e.g. Reduce the
risks, Proper feeding reduces illness). Slogans were positioned
approximately 9.5 degrees of visual angle below the image, and
ranged from three to six words in length.Before the experiment began, participants underwent an eye movement
calibration to ensure that the device was able to detect the
participant’s eyes and track them as they moved. Successful
calibration was followed by the Categorization Task, which
involved the presentation of the infant-feeding posters in
random order. Response mappings for each of the categorization
tasks were counterbalanced across participants. For example,
half of the participants in the Picture Assessment
task used one response mapping
(“z” for breastfeeding pictures, “/” for
bottle-feeding pictures) while the other half used the opposite
response mapping.After viewing all 40 picture-slogan pairs and making forced-choice
decisions regarding each pair, the participants were presented
with a surprise Slogan Recall Task, which required them to use
the keyboard to type as many slogans as they could recall.
Following the completion of this task, participants were then
presented with a surprise Slogan Recognition Task. In this task,
old and new slogans were presented one at a time and
participants were asked to decide whether the slogan was
previously presented in the Categorization Task (i.e. old) or
whether it was never shown before (i.e. new). Responses were
made by pressing one of two computer keys (e.g.
“z” for old or “/” for new). Accuracy for
both memory tasks was recorded.
Categorization RTs (in ms)
Categorization RT data were subjected to analyses of variance
(ANOVAs) using the within-subjects factors of Picture Type
(Breast or Bottle), between-subjects factors of Categorization
Task (Picture Assessment, Slogan Assessment, and Slogan-Picture
Appropriateness), and Response Mapping (A or B). As pictured in
Figure
1, categorization times were significantly faster
overall for breastfeeding pictures (1459 ms) than for
bottle-feeding pictures (1713 ms), F (1,
66) = 8.61, p < .01. There were also
significant differences in overall categorization times across
the three tasks, F (2, 66) = 11.77,
p < .01. Categorization times were
fastest in the Picture Assessment Task (878 ms), slowest in the
Slogan Assessment Task (2239 ms), and intermediate in the
Slogan-Picture Appropriateness Task (1641 ms), all
p’s < .05. This finding is consistent
with the prediction that categorization times would be faster
for tasks that required participants to look at the image on the
poster. No other main effects or interactions reached
significance.
Figure 1.
Categorization time (in ms) as a function of Task
Type × Image Type (significant main effects of
Picture Type and Task,
p’s < .01).
Categorization time (in ms) as a function of Task
Type × Image Type (significant main effects of
Picture Type and Task,
p’s < .01).
Looking time (in ms)
Looking time data were subjected to ANOVAs using the
within-subjects factors of Poster Area (Slogan or Picture) and
Feeding Type (Breast or Bottle), and the between-subjects factor
of Categorization Task (Picture Assessment, Slogan Assessment,
and Slogan-Picture Appropriateness). As pictured in Figure
2, looking times were shorter overall when the posters
depicted breastfeeding (1299 ms) versus bottle-feeding
(1428 ms), F (1, 69) = 15.9,
p < .01. This finding is consistent with the
prediction that participants would minimize the time they spent
on breastfeeding images compared to bottle-feeding images.
Looking times also varied across task type, F
(2, 69) = 5.03, p < .01. That is, looking
times were significantly (p’s < .05) shorter
for the Picture Assessment task (1107 ms) than either the Slogan
Assessment task (1422 ms) or the Slogan-Picture Appropriateness
task (1560 ms), which did not differ from one another.
Figure 2.
Looking time (in ms) as a function of Task
Type × Feeding Type (significant main effects of
Picture Type and Task,
p’s < .01).
Looking time (in ms) as a function of Task
Type × Feeding Type (significant main effects of
Picture Type and Task,
p’s < .01).As pictured in Figure 3, participants looked at slogans (653 ms)
for significantly less time than pictures (2074 ms),
F (1, 69) = 196.7,
p < .01. The Feeding Type (Breast,
Bottle) × Poster Area (Slogan, Picture) interaction was
significant, F (1, 69) = 12.01,
p < .01. Simple effects tests revealed
that there was no significant difference in the time
participants spent looking at slogans paired with a
breastfeeding image (639 ms) or a bottle-feeding image (667 ms),
F (1, 71) = 1.11. There was, however, a
significant difference in looking time for the pictures when the
poster depicted breastfeeding (1958 ms) versus bottle-feeding
(2189 ms), F (1, 71) = 17.05,
p < .01. These results confirm that
participants looked at both types of pictures and the slogans
paired with those pictures. As expected, breastfeeding posters
were viewed for significantly less time than bottle-feeding
posters.
Figure 3.
Looking Time (in ms) as a function of Feeding
Type × Poster Area (significant main effect of
Poster Area, p < .01).
**p < .01.
Looking Time (in ms) as a function of Feeding
Type × Poster Area (significant main effect of
Poster Area, p < .01).
**p < .01.The Task Type (Picture Assessment, Slogan Assessment, or
Slogan-Picture Appropriateness) × Poster Area (Slogan or
Picture) interaction was also significant, F
(2, 69) = 5.48, p < .01; see Figure
4. Simple effects tests revealed that the time
participants spent looking at the slogans significantly differed
across tasks. The longest looking times occurred for slogans in
the Slogan Assessment Task (904 ms,
p’s < .01), compared to either the Picture
Assessment task (420 ms) or the Slogan-Picture Appropriateness
task (634 ms), which did not differ from one another,
F (2, 69) = 7.63,
p < .01. In contrast, the overall time that
participants spent looking at the pictures was significantly
longer (p’s < .05) in the Slogan-Picture
Appropriateness task (2487 ms) than for either the Picture
Assessment task (1795 ms) or the Slogan Assessment task
(1940 ms), which did not differ from one another. As expected,
these findings indicate that where participants looked, and how
long they looked, depended on the task assigned to them.
Figure 4.
Looking Time (in ms) as a function of Task
Type × Poster Area (significant interaction,
p < .01, where looking time
was longer for the Slogan Assessment Task than the
other two tasks).
Looking Time (in ms) as a function of Task
Type × Poster Area (significant interaction,
p < .01, where looking time
was longer for the Slogan Assessment Task than the
other two tasks).
Slogan recall (%)
Slogan recall (%) data were subjected to ANOVAs using the
within-subjects factors of Picture Type (Breast or Bottle),
between-subjects factors of Categorization Task (Picture
Assessment, Slogan Assessment, and Slogan-Picture
Appropriateness), and Response Mapping (A or B). The percentage
of slogans that were recalled did not significantly differ based
on whether a breastfeeding (14.9%) or bottle-feeding (14.5%)
picture was present; in other words, there was no main effect of
Picture Type, F < 1; see Figure
5. Slogan recall was similarly low across both poster
types. The reasons for this are not yet clear and will require
further study, but would be expected to improve if participants
were given advance notice of the memory test. Slogan recall,
however, did vary across task (i.e. significant main effect of
Task Type), F (2, 66) = 16.1,
p < .001. Recall was significantly
lower (p’s < .01) in the Picture Assessment
task (7.6%) than in either the Slogan Assessment task (19.0%) or
the Slogan-Picture Appropriateness task (17.5%), which were
statistically similar. This finding likely reflects the fact
that the slogan was not relevant for the completion of the
Picture Assessment task, but was relevant to the other two
tasks. No other main effects or interactions reached
significance.
Figure 5.
Slogans Recalled (%) as a function of Task Type × Image
Type (significant main effect of Task,
p < .001, with recall lowest
in the Picture Assessment task).
Slogans Recalled (%) as a function of Task Type × Image
Type (significant main effect of Task,
p < .001, with recall lowest
in the Picture Assessment task).
Slogan recognition (%)
Slogan recognition data (% correct) were subjected to ANOVAs using
the within-subjects factors of Picture Pairing (Breast, Bottle,
or None), between-subjects factors of Categorization Task
(Picture Assessment, Slogan Assessment, and Slogan-Picture
Appropriateness), and Response Mapping (A or B). Overall,
accuracy on the slogan recognition test was similar whether the
slogan was new (82.3%), that is, not previously paired with a
picture, or paired with a breastfeeding picture (83.8%), or
bottle-feeding picture (81.7%), F (2,
132) < 1, n.s. Again, this finding is in contrast to the
hypothesized outcomes. The percentage of slogans that were
recognized with each type of picture pairing, however, depended
on the categorization task assigned (i.e. significant Picture
Pairing × Task Type interaction, F (4,
132) = 3.13, p < .05) (see Figure
6). Simple effects tests revealed a significant main
effect of Picture Pairing in the Slogan Assessment task only,
F (2, 46) = 3.71,
p < .05. Slogans paired with bottle-feeding
pictures were better recognized (92.5%) than new slogans (86%,
p < .05), but did not differ with
respect to breastfeeding pictures (90.8%). No main effects or
other interactions reached significance.
Figure 6.
Slogans Recognized (%) as a function of Task
Type × Image Pairing (significant interaction,
p < .05, where in the Slogan
Assessment task recognition was highest for slogans
paired with bottle-feeding pictures).
Slogans Recognized (%) as a function of Task
Type × Image Pairing (significant interaction,
p < .05, where in the Slogan
Assessment task recognition was highest for slogans
paired with bottle-feeding pictures).
Task assessment measures (%)
Because each Categorization Task involved a different measure (%
correct for the Picture Assessment task, percent positive for
the Slogan Assessment task, and percent appropriate for the
Slogan-Picture Assessment task), measures were analyzed
separately. Each analysis involved an ANOVA using the
within-subjects factor of Picture Type (Breast, Bottle),
between-subjects factors of Categorization Task (Picture
Assessment, Slogan Assessment, Slogan-Picture Appropriateness),
and Response Mapping (A or B):Picture Assessment Task. Participants
in this task were equally accurate at categorizing
breastfeeding pictures (99% correct) and
bottle-feeding pictures (98% correct),
F (1, 22) = 2.80,
p > .10. No other effects were
significant.Slogan Assessment Task. More of the
slogans paired with breastfeeding pictures were
rated as positive (88% positive) compared to the
slogans paired with bottle-feeding pictures (51% positive),
F (1, 22) = 44.3,
p < .01. No other effects were
significant.Slogan-Picture Appropriateness Task.
More of the slogans that were paired with
breastfeeding pictures were categorized as
appropriate (80% appropriate) compared to the
slogans paired with bottle-feeding pictures (44%
appropriate), F (1, 22) = 21.4,
p < .01. No other effects were
significant.The results from this study suggest that regardless of the task,
participants were faster to make their categorization decisions
in the presence of a breastfeeding image versus a bottle-feeding
image. This was the case even when the image was irrelevant to
the task, as in the Slogan Assessment Task. Additionally,
participants tended to look at the breastfeeding images for a
significantly shorter period of time than the bottle-feeding
images. Taken together, these results suggest that participants
reacted differently to breastfeeding and bottle-feeding images.
One possible interpretation for these differences in looking
times is that participants may have experienced discomfort when
looking at the breastfeeding images. This interpretation is
entirely consistent with the results from existing survey and
focus group data suggesting that individuals are embarrassed to
see breastfeeding, particularly in a public setting (Forrester et
al., 1997; Kavanagh et al.,
2012; Li et al., 2002; McIntyre et al.,
2001; Spurles and Babineau, 2011; Tarrant and Dodgson,
2007). This interpretation also aligns with the
results from Study 1, where the majority of participants
expected others to have a negative or mixed reaction to a
breastfeeding poster campaign that depicted breastfeeding. It is
entirely possible that young adults not only expect others to be
uncomfortable to see breastfeeding but also experience
discomfort when exposed to breastfeeding images. Given that
people tend to have more experience with seeing bottle-feeding
than seeing breastfeeding, it would make sense that they are
less comfortable seeing the latter. This again points to the
importance of exposure.It was interesting that this quantitatively different response to
breastfeeding versus bottle-feeding images did not lead to
poorer recall and recognition of the slogans paired with the
breastfeeding images. Slogan recall and recognition varied
across tasks (i.e. lowest overall in the Picture Assessment
Task), but did not depend on image pairing (i.e. breastfeeding
versus bottle-feeding). This finding is good news for the
promotion of breastfeeding; it suggests that even if people tend
to minimize how long they look at breastfeeding posters (whether
because of discomfort, or not), this decreased looking time is
likely to have minimal impact on how well they process the
written information that accompanies the picture. Even though
this study provides clear evidence that people made faster
decisions about breastfeeding versus bottle-feeding posters, and
that they looked at breastfeeding pictures for shorter
durations, it remains to be seen whether these findings can be
attributed to discomfort.
Study 3
In Study 3, we wanted to determine whether discomfort viewing breastfeeding
images could account for the shorter viewing times of the breastfeeding
versus bottle-feeding posters in Study 2. We recruited a new group of
participants for this study for three main reasons. One, exposure to
breastfeeding images has the potential to positively influence how
comfortable one is to see breastfeeding, so we wanted a group of
participants who would see these images for the first time, just like the
original participants in Study 2. If we tested the same group of
participants, the pictures would have been familiar and may not elicit the
same level of discomfort the second time around. Two, although the
breastfeeding and bottle-feeding pictures used in Study 2 were comparable,
they were selected from those available on the Internet, which meant that
there were inevitable variations in the photos from the two sets. Thus, it
would be helpful to know whether this same photo set elicits discomfort in a
new group of participants. Three, by testing a new group of participants, it
was possible to assess discomfort within a larger sample of participants,
which would ensure greater generalizability of the results. We predicted
that participants would be significantly more uncomfortable viewing
breastfeeding images.Undergraduate students enrolled in Introductory Psychology classes
at the researchers’ institution were invited, by email and/or
through short in-class presentations, to participate in a large
online survey package. Participation was voluntary and surveys
were completed outside of class time.To be included in the study, students had to be enrolled in
Introductory Psychology, and they had to complete the large
online survey package. A total of 440 undergraduate psychology
students participated and received partial course credit.
Participants were excluded from this study if they did not
complete the survey of interest, the Picture Rating survey; six
participants were excluded for this reason. Again, since the
focus of the study was on young adults, we limited our analysis
to those participants aged 17–25 years; this criterion excluded
an additional four participants.In total, there were 430 participants (336 females, 92 males, and 2
undisclosed) who were included in this study. The average age of
participants was 18 years old. The majority (87.9%) of students
were in their first year of university. Within the sample,
87 percent were Euro-Canadian, .9 percent African-Canadian,
.9 percent Asian, .5 percent Aboriginal, and 7 percent selected
“Other.”The introductory text included with the Picture Rating survey
informed participants that they would be looking at images that
depicted infant feeding and that were being considered for use
in educational materials. They were asked to indicate how
comfortable they felt viewing each image. Comfort ratings were
made using a 7-point Likert scale (1 = very uncomfortable and
7 = very comfortable). All 40 images (20 breastfeeding and 20
bottle-feeding) used in Study 2 were presented in random order
to each participant. Ratings for each image were recorded
electronically. In order to compare ratings for breastfeeding
images where the mother’s breast was partially visible to those
where the breast was not visible, ratings were averaged across
the 10 pictures in these two subgroups. To compare ratings of
breastfeeding and bottle-feeding images, ratings were averaged
across all 20 pictures within each picture type to provide an
average breastfeeding comfort rating and an average
bottle-feeding comfort rating for each participant.To confirm that there was internal consistency across ratings for the 20
breastfeeding images and across ratings for the 20 bottle-feeding
images, a reliability analysis was conducted for each image set.
Cronbach’s alpha for comfort level ratings of breastfeeding images was
.98, suggesting high internal consistency. Similarly, Cronbach’s alpha
for ratings of bottle-feeding images was also .98, which suggests high
internal consistency for that image set as well. Average comfort
ratings were computed for each picture in the two picture sets.
Average comfort ratings for each of the 20 breastfeeding images ranged
from a low of 3.60 to a high of 5.89. Average comfort ratings for each
of the 20 bottle-feeding images ranged from a low of 5.95 to a high of
6.49. It is interesting to note that the average comfort ratings at
the top range for breastfeeding images was lower than the average
ratings at the bottom range for bottle-feeding images. Given these
differences in the range of comfort ratings, it is obvious that
participants were uncomfortable viewing the breastfeeding images and
that they responded very differently to these images than they did to
the bottle-feeding images.A dependent samples t-test was conducted to compare
average comfort ratings for breastfeeding versus bottle-feeding
pictures. Participants rated being significantly less comfortable
looking at breastfeeding pictures (4.90) than bottle-feeding pictures
(6.33), t (429) = −19.45,
p < .001. This finding is consistent with
“discomfort” seeing breastfeeding images as a possible explanation for
the shorter looking times for breastfeeding versus bottle-feeding
posters in Study 2.A dependent samples t-test was also conducted to compare
average comfort ratings for the 10 breastfeeding images where the
mother’s breast was partially exposed to the 10 images where the
breast was not exposed. Ratings were significantly lower when the
mother’s breast was visible (4.26) than when the breast was not
visible (5.55), t (429) = −23.81,
p < .001. This difference in ratings indicates
that participants are significantly less comfortable viewing
breastfeeding images where the mother’s breast is visible than where
the breast is concealed in some way. Again, these results are also
consistent with the “discomfort” hypothesis that was proposed as an
explanation for the shorter looking times on breastfeeding posters
compared to bottle-feeding posters in Study 2. These findings are also
consistent with the existing literature suggesting people tend to be
uncomfortable seeing a woman breastfeeding her baby (e.g. Meng et al.,
2013; Stewart-Knox et al., 2003) and believe that mothers
should cover up and be discreet if they are to breastfeed in public
(Spurles and
Babineau, 2011).
General discussion
The aim of this research was to assess both implicitly and explicitly how young
adults react to seeing breastfeeding. In Study 1, participants were asked to
look at a breastfeeding promotion poster and indicate how others might react
to seeing the poster; many participants believed that public response to
seeing breastfeeding is one of discomfort and
disgust. This negative perception of the social norms around breastfeeding
has the potential to keep future breastfeeding rates low. Despite this
perception, we found that most young adults intend to breastfeed their
child(ren). Although the intent to breastfeed is high in this sample of
young adults, and is promising for breastfeeding in the future, social norms
could negatively impact the duration of breastfeeding. One way to improve
the perception of social norms is through positive exposure to breastfeeding
and breastfeeding images (e.g. Giles et al., 2014). For example,
it is now well established that previous exposure to breastfeeding is linked
to positive attitudes about breastfeeding and one’s intent to breastfeed
(Greene et al.,
2003; Hoddinott et al., 2010; Isaacowitz et al., 2006; Tarrant and Dodgson,
2007). Increased opportunity for exposure to breastfeeding is
particularly important in geographic areas where it is still relatively
uncommon to see breastfeeding.One relatively easy way to increase exposure to breastfeeding in geographic
regions where breastfeeding rates are low is through poster campaigns where
breastfeeding images are visible on the posters. We asked in Study 2 how
young adults would react to seeing breastfeeding posters and whether the
presence of the breastfeeding image would impact their memory for the
accompanying slogan. We found that when young adults were presented with
infant-feeding posters, they looked at the breastfeeding posters for
significantly less time than the bottle-feeding posters, regardless of the
task that they were assigned. Even though we are not able to say with
certainty why this is, we know from the recognition memory test that memory
for the slogans used in these posters was comparable across both poster
types, suggesting that shorter looking times on breastfeeding posters did
not jeopardize intake of the accompanying message.In Study 3, we explicitly asked participants to rate their comfort level
viewing the same breastfeeding and bottle-feeding images used in Study 2.
The comfort ratings assigned to breastfeeding images were unquestionably
lower than those assigned to the bottle-feeding images, indicating that
participants experienced discomfort when seeing breastfeeding. Based on
these results, it seems likely that the shorter looking times for
breastfeeding posters in Study 2 also reflect discomfort, especially since
looking times were short across all tasks.Using breastfeeding images to promote breastfeeding might help to normalize
images of the functional or nurturing breast, and in the long run, could
both reduce the embarrassment of seeing breastfeeding and the embarrassment
of being the one to breastfeed in public. This is important given evidence
suggesting that intent to breastfeed and subsequent breastfeeding behavior
is lower for women who express embarrassment about breastfeeding (Bonia et al.,
2013; Hoddinott
et al., 2010) and that “not wanting to breastfeed in public”
was cited as being an important reason for discontinuing breastfeeding in a
large survey sample of US mothers (Li et al., 2008). Breastfeeding
initiation is higher among women exposed to breastfeeding through television
or video compared to those with no exposure to breastfeeding (e.g. Hoddinott et al.,
2010). Thus, showing positive images of breastfeeding in
various contexts, such as poster campaigns, may be one way of increasing
exposure and improving comfort level and attitudes over time.
Limitations
This research provides some promising, albeit preliminary, data to suggest that
using breastfeeding images to promote breastfeeding can be done without
jeopardizing the intake of the accompanying message, even if the viewer
might be uncomfortable seeing the breastfeeding images. Future research can
confirm that individuals who self identify as being uncomfortable seeing
breastfeeding images still process any written messages that accompany those
images.It was somewhat surprising that slogan recall was low overall for both poster
types. It is possible that since the posters were randomly presented such
that breastfeeding posters were intermixed with bottle-feeding posters, the
presence of breastfeeding posters impacted how the bottle-feeding posters
were processed. Further study is needed to see if this is the case. For
example, if presentation of poster types is blocked, will slogan recall
improve for bottle-feeding posters? Another possibility is that since
participants were not explicitly asked to remember the slogans (the memory
test was a surprise), maybe they only minimally processed the slogans. This
is an interesting possibility that has implications for how posters are
processed in general. Finally, the slogans varied across posters. This is
different from typical poster campaigns where only a few different slogans
are used. Perhaps the slogans would have been more memorable and recalled
more easily if there were fewer slogans, and if the same slogans were used
consistently across posters. These are all possibilities to be explored in
future research. Future research is also needed to confirm whether the
results of this study extend to slogans that are longer in length, and
slogans that tend to be more novel (less catchy) or that seem less
familiar.
Conclusion
Despite high intentions to breastfeed, our sample of young adults reported
mixed or negative perceptions of public reaction to seeing breastfeeding
images. This discrepancy is concerning for two reasons. One, although young
adults may see the value in breastfeeding and may want to breastfeed,
uncertainty in how others will react may hamper this behavior. Two, these
results suggest that young adults are still getting mixed messages about
breastfeeding; breastfeeding is something to be done but not something to be
seen. Positive exposure to breastfeeding could help ensure that the
messaging around breastfeeding is more uniform and consistent. This research
should alleviate concerns that using breastfeeding images to promote
breastfeeding might come at a cost to message processing. Our results
suggest that even if viewing time is limited, it is still possible to take
in the messaging paired with breastfeeding images. We know from past
research that exposure to breastfeeding is linked to intent to breastfeed
and positive attitudes toward breastfeeding (Hoddinott et al., 2010; Tarrant and Dodgson,
2007), so using breastfeeding images within promotional
campaigns will likely be far more beneficial than it is risky. Not only
should increased exposure to breastfeeding improve overall comfort levels,
but it may also help to narrow the gap that is growing between the
acceptability of bottle-feeding in public and the acceptability of
breastfeeding in public.
Authors: Melanie Giles; Carol McClenahan; Cherie Armour; Samantha Millar; Gordon Rae; John Mallett; Barbara Stewart-Knox Journal: Br J Health Psychol Date: 2013-01-25
Authors: Catherine R L Brown; Linda Dodds; Rebecca Attenborough; Janet Bryanton; Annette Elliott Rose; Gordon Flowerdew; Donald Langille; Leeanne Lauzon; Sonia Semenic Journal: CMAJ Open Date: 2013-01-16