| Literature DB >> 29117257 |
Bibiana M Armenta1, Katherine Stroebe1, Susanne Scheibe1, Tom Postmes1, Nico W Van Yperen1.
Abstract
Integrating the social identity and aging literatures, this work tested the hypothesis that there are two independent, but simultaneous, responses by which adults transitioning into old age can buffer themselves against age discrimination: an individual response, which entails adopting a younger subjective age when facing discrimination, and a collective response, which involves increasing identification with the group of older adults. In three experimental studies with a total number of 488 older adults (50 to 75 years of age), we manipulated age discrimination in a job application scenario and measured the effects of both responses on perceived health and self-esteem. Statistical analyses include individual study results as well as a meta-analysis on the combined results of the three studies. Findings show consistent evidence only for the individual response, which was in turn associated with well-being. Furthermore, challenging previous research, the two responses (adopting a younger subjective age and increasing group identification) were not only theoretically, but also empirically distinct. This research complements prior research by signaling the value of considering both responses to discrimination as complementary rather than mutually exclusive.Entities:
Mesh:
Year: 2017 PMID: 29117257 PMCID: PMC5678732 DOI: 10.1371/journal.pone.0187805
Source DB: PubMed Journal: PLoS One ISSN: 1932-6203 Impact factor: 3.240
Samples composition and participants demographics of Studies 1, 2 and 3.
| Study | Sample size | No. Outliers | Mean Age | SD Age | % female | Work status | Level of education | Recruitment date | Drop-out rate |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 126 | 6 | 57.3 | 5.79 | 66.90% | 27% full-time; | 8.7% high school; | Mar 2013- | 7.69% |
| 2 | 145 | 8 | 57.16 | 5.43 | 66.20% | 38.6% full-time; | 14.5% high school; | Nov 2013- | 6.70% |
| 3 | 217 | 17 | 56.81 | 5.5 | 59.40% | 58.1% full-time; | 29% high school; | Jul-16 | 14.46% |
1 Five persons stated that their data should be excluded [41] and one person appeared to be an outlier on the main dependent variable subjective health based on outlier analyses via Cook’s [42] distance (i.e., using the cut-off value of Cook’s distance being larger than four divided by the number of observations).
2 Participants appeared to be outliers on the main dependent variable subjective health based on outlier analyses via Cook’s [42] distance.
3 Four persons stated that their data should be excluded [41] and thirteen appeared to be outliers on the main dependent variable subjective health based on outlier analyses via Cook’s [42] distance.
Reliabilities, means and standard deviations (per condition), and correlations between central study variables in Study 1.
| Cronbach’s α | Control | Discrimination | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||
| 1 | Age | - | 57.66 | 6.42 | 56.95 | 5.14 | - | |||||||
| 2 | Gender | - | 64.5% | - | 69.2% | - | .10 | - | ||||||
| 3 | Discrimination Attribution | .97 | 3.27 | 2.05 | 5.45 | 1.25 | .04 | .09 | - | |||||
| 4 | Personal Attribution | .81 | 5.31 | 1.21 | 4.33 | 1.67 | -.02 | -.14 | -.34 | - | ||||
| 5 | Group Identification | .84 | 5.20 | 1.56 | 5.86 | 1.07 | .10 | .03 | .32 | -.10 | - | |||
| 6 | Subjective Age | - | 48.29 | 11.61 | 42.33 | 9.65 | .39 | .24 | -.07 | .12 | .21 | - | ||
| 7 | Subjective Age Bias | - | 9.37 | 10.32 | 14.08 | 9.4 | .15 | -.20 | .12 | -.14 | -.17 | -.85 | - | |
| 8 | Subjective Health | .86 | 3.58 | 0.99 | 3.95 | 0.75 | .10 | -.12 | .19 | -.15 | -.13 | -.39 | .48 | - |
| 9 | State Self-Esteem | .78 | 4.19 | 0.66 | 4.39 | 0.43 | .16 | -.19 | .12 | -.13 | .01 | -.16 | .28 | .45 |
Notes. N = 126. Gender is coded 1 for female and 2 for male.
* p < .05
** p < .01
*** p < .001.
a,b Means with differing superscripts within rows are significantly different at the p < .05.
1Given percentages refer to percentage of female participants on each condition.
Reliabilities, means and standard deviations (per condition), and correlations between central study variables in Study 3.
| Cronbach’s α | Control | Discrimination | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |||||||
| 1 | Age | - | 57.35 | 5.84 | 56.25 | 5.07 | - | |||||||
| 2 | Gender | - | 58.2% | - | 60.7% | 0.49 | .22 | - | ||||||
| 3 | Discrimination Attribution | .91 | 3.23 | 1.78 | 4.57 | 1.61 | .17 | -.05 | - | |||||
| 4 | Personal Attribution | .66 | 4.10 | 1.53 | 4.33 | 1.46 | -.04 | .02 | .22 | - | ||||
| 5 | Group Identification | .73 | 5.00 | 1.15 | 5.04 | 1.20 | .10 | .06 | .11 | .11 | - | |||
| 6 | Subjective Age | - | 47.37 | 9.82 | 45.80 | 9.86 | .32 | .19 | .04 | .12 | .14 | - | ||
| 7 | Subjective Age Bias | - | 9.98 | 9.20 | 10.49 | 10.11 | .25 | -.08 | .06 | -.15 | -.08 | -.84 | - | |
| 8 | Subjective Health | .76 | 3.72 | 0.66 | 3.77 | 0.67 | .24 | .04 | .07 | -.05 | .10 | -.11 | .25 | - |
| 9 | State Self-Esteem | .77 | 4.05 | 0.65 | 4.03 | 0.62 | .06 | .00 | -.16 | -.21 | .11 | -.05 | .08 | .31 |
Note. N = 217. Gender is coded 1 for female and 2 for male.
* p < .05
** p < .01
*** p < .001.
a,b Means with differing superscripts within rows are significantly different at the p < .05.
1Given percentages refer to percentage of female participants on each condition.
Fig 1Meta-analytical results of the correlation between subjective age bias and group identification.
This forest tree includes the correlation between subjective age bias and group identification of the 3 studies with corresponding 95% confidence intervals in the individual studies. The summary polygon at the bottom of the plot shows the results from a random-effects model when analyzing all 3 studies. RE Model = Random-effects model.
Statistical tests of main results in Studies 1 to 3 and meta-analysis of the combined effects of all three studies.
| Result tested | Study | Effect size (SE) | Test | p-value | 95% CI [LL, UL] |
|---|---|---|---|---|---|
| Discrimination → SAB (Hypothesis 1a) | 1 | 0.030 | [0.41, 8.09] | ||
| 2 | 0.004 | [1.83, 9.37] | |||
| 3 | 0.581 | [-1.85, 3.30] | |||
| meta-analysis | β = 0.15 (0.07) | 0.023 | [0.02, 0.30] | ||
| Discrimination → GI (Hypothesis 1b) | 1 | 0.011 | [0.12, 1.18] | ||
| 2 | 0.148 | [-0.81, 0.12] | |||
| 3 | 0.922 | [-0.30, 0.33] | |||
| meta-analysis | β = -0.03 (0.17) | 0.837 | [-0.37, 0.30] | ||
| Discrimination → SH (total effect) | 1 | 0.052 | [-0.00, 0.65] | ||
| 2 | 0.057 | [-0.00, 0.65] | |||
| 3 | 0.481 | [-0.12, 0.24] | |||
| meta-analysis | β = 0.12 (.05) | 0.015 | [0.02, 0.21] | ||
| Discrimination → SSE (total effect) | 1 | 0.119 | [-0.04, 0.38] | ||
| 2 | 0.753 | [-0.15, 0.21] | |||
| 3 | 0.903 | [-0.16, 0.18] | |||
| meta-analysis | β = 0.05 (0.05) | 0.263 | [-0.04, 0.14] | ||
| SAB → SH (controlling for discrimination, group identification and personal attributions; Hypothesis 2a) | 1 | < .001 | [0.02, 0.05] | ||
| 2 | < .001 | [0.01, 0.03] | |||
| 3 | < .001 | [0.01, 0.03] | |||
| meta-analysis | β = 0.34 (0.05) | < .001 | [0.23, 0.44] | ||
| SAB → SSE (controlling for discrimination, group identification and personal attributions; Hypothesis 2a) | 1 | 0.016 | [0.00, 0.03] | ||
| 2 | 0.007 | [0.00, 0.02] | |||
| 3 | 0.503 | [-0.01, 0.01] | |||
| meta-analysis | β = 0.18 (0.06) | 0.003 | [0.06, 0.29] | ||
| GI → SH (controlling for discrimination, subjective age bias and personal attributions; Hypothesis 2b) | 1 | 0.248 | [-0.17, .05] | ||
| 2 | 0.752 | [-0.11, 0.08] | |||
| 3 | 0.083 | [-0.01, 0.15] | |||
| meta-analysis | β = 0.00 (0.06) | 0.939 | [-0.12, 0.13] | ||
| GI → SSE (controlling for discrimination, subjective age bias and personal attributions; Hypothesis 2b) | 1 | 0.910 | [-0.07, 0.08] | ||
| 2 | 0.642 | [-0.05, 0.07] | |||
| 3 | 0.095 | [-0.01, 0.16] | |||
| meta-analysis | β = 0.07 (0.05) | 0.101 | [-0.01, 0.16] | ||
| Discrimination → SAB → SH (controlling for group identification and personal attributions; Hypothesis 3a) | 1 | 0.057 | [0.03, 0.36] | ||
| 2 | 0.014 | [0.05, 0.23] | |||
| 3 | 0.600 | [-0.03, 0.07] | |||
| meta-analysis | β = 0.05 (0.05) | 0.263 | [-0.04, 0.14] | ||
| Discrimination → SAB → SSE (controlling for group identification and personal attributions; Hypothesis 3a) | 1 | 0.118 | [0.01, 0.15] | ||
| 2 | 0.053 | [0.01, 0.13] | |||
| 3 | 0.755 | [-0.01, 0.04] | |||
| meta-analysis | β = 0.03 (0.05) | 0.506 | [-0.06, 0.12] | ||
| Discrimination → GI → SH (controlling for subjective age bias and personal attributions; Hypothesis 3b) | 1 | 0.326 | [-0.16, 0.01] | ||
| 2 | 0.798 | [-0.02, 0.06] | |||
| 3 | 0.933 | [-0.02, 0.03] | |||
| meta-analysis | β = -0.00 (0.05) | 0.916 | [-0.09, 0.08] | ||
| Discrimination → GI → SSE (controlling for subjective age bias and personal attributions; Hypothesis 3b) | 1 | 0.917 | [-0.05, 0.06] | ||
| 2 | 0.710 | [-0.04, 0.01] | |||
| 3 | 0.933 | [-0.02, 0.04] | |||
| meta-analysis | β = -0.00 (0.05) | 0.955 | [-0.09, 0 .09] |
Note. SAB = Subjective age bias; GI = Group identification; SH = Subjective health; SSE = State Self-esteem.
Fig 2Combined results of the collective and the individual routes on subjective health.
Estimates are presented in standardized values (β), after partializing the effects of all other relevant variables. IE = indirect effect of independent variable on dependent variable through the proposed mediator. * p < .05; ** p < .01; *** p < .001; ns: non-significant at the .05 level.
Fig 3Combined results of the collective and the individual routes on state self-esteem.
Estimates are presented in standardized values (β), after partializing the effects of all other relevant variables. IE = indirect effect of independent variable on dependent variable through the proposed mediator. * p < .05; ** p < .01; *** p < .001; ns: non-significant at the .05 level.
Reliabilities, means and standard deviations (per condition), and correlations between central study variables in Study 2.
| Control | Discrimination | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cronbach’s α | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ||||||
| 1 | Age | - | 57.46 | 5.16 | 56.84 | 5.70 | - | |||||||
| 2 | Gender | - | 67.1% | - | 65.3% | - | -.01 | - | ||||||
| 3 | Discrimination Attribution | .97 | 3.21 | 1.91 | 5.08 | 1.49 | .13 | -.01 | - | |||||
| 4 | Personal Attribution | .80 | 4.58 | 1.72 | 3.81 | 1.57 | -.18 | .01 | -.18 | - | ||||
| 5 | Group Identification | .81 | 5.54 | 1.42 | 5.13 | 1.38 | .15 | -.05 | .06 | .12 | - | |||
| 6 | Subjective Age | - | 50.25 | 14.42 | 43.24 | 9.34 | .26 | .02 | -.06 | .11 | .12 | - | ||
| 7 | Subjective Age Bias | - | 7.22 | 13.98 | 13.61 | 9.54 | .17 | -.01 | .12 | -.19 | -.06 | -.91 | - | |
| 8 | Subjective Health | .82 | 3.53 | 0.86 | 3.86 | 0.64 | .11 | -.01 | .06 | -.24 | -.08 | -.35 | .40 | - |
| 9 | State Self-Esteem | .76 | 4.20 | 0.62 | 4.29 | 0.48 | .13 | .09 | -.04 | -.24 | .00 | -.20 | .26 | .29 |
Notes. N = 145. Gender is coded 1 for female and 2 for male.
* p < .05
** p < .01
*** p < .001.
a,b Means with differing superscripts within rows are significantly different at p < .05.
1Given percentages refer to percentage of female participants on each condition.