Rhythm and Movement for Self-Regulation (RAMSR) intervention for preschool self-regulation development in disadvantaged communities: a clustered randomised controlled trial study protocol.

INTRODUCTION: Self-regulation (the ability to regulate emotion, attention, cognition and behaviour) is an integral part of early learning competence in the years prior to school. Self-regulation skills are critical to ongoing learning behaviours, achievement and well-being. Emerging neurological evidence suggests coordinated music and movement participation could support self-regulation development for all children. A pilot study in 2016 introduced a coordinated music and movement programme designed to boost self-regulation skills in children in disadvantaged communities, delivered by visiting specialists, with promising findings. The intervention is based on the neuroscience of beat synchronisation, rhythmic entrainment and the cognitive benefits of music therapy and music education-and is called Rhythm and Movement for Self-Regulation (RAMSR). This study builds on the pilot by training regular teachers to deliver RAMSR in their classrooms (rather than visiting specialists). The study aims to establish the effectiveness of RAMSR, which is designed to translate the cognitive benefits that accrue from rhythm participation to address self-regulation for children who do not typically access high-quality music programmes. METHODS AND ANALYSIS: We will recruit 237 children from up to eight kindergartens in low socioeconomic areas. INTERVENTION: teachers will be trained to deliver the RAMSR intervention during group time in kindergartens, daily for 8 weeks. CONTROL: usual practice kindergarten programme. FOLLOW-UP: end of intervention using child assessments and teacher report; 12 months postbaseline using school teacher reports following school transition. Primary outcomes: executive function and self-regulation. SECONDARY OUTCOMES: school readiness; visual-motor integration; teacher-reported behaviour problems, school transition and academic competency; teacher knowledge, confidence, practice and attitudes related to self-regulation, rhythm and movement; fidelity of intervention implementation. ETHICS AND DISSEMINATION: Queensland University of Technology Human Research Ethics Committee, approval 1900000566. Findings dissemination: in-field workshops to service providers, conference presentations, journal and professional publications. TRIAL REGISTRATION NUMBER: ACTRN12619001342101; Pre-results (30 September 2019). © Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

RCT Entities:   Population Interventions Outcomes

This is the first trial to examine the effectiveness of training early childhood teachers to use rhythmic movement to support self-regulation development.

A wide range of measures including direct assessments and teacher report are used for the outcomes.

The use of teacher reports for some constructs is a limitation.

Children will be followed up 1 year later after transitioning to school.

Maintaining the sample size to the 1-year follow-up will be a challenge.

Background

Self-regulation is an umbrella term that includes regulating attention and emotion, and the executive functions including working memory (holding information in mind), shifting (flexible shifting of attention between information or tasks) and inhibition (the ability to control urges and resist distraction).1 2 These self-regulation skills develop rapidly across early childhood, and a large body of research has now established their predictive association with a range of later life outcomes including educational achievement,3 adolescent and adult adaptive behaviours and life success.4 5 Importantly, children with poor early childhood self-regulation skills are at risk of later behaviour problems,6 adolescent risk taking4 and adult disordered behaviour.5

It has been estimated that up to 30% of children aged up to 5 years in Australia may experience self-regulation difficulties including below average attentional and emotional regulation skills that do not improve as expected over time.7 A number of life circumstances place children at heightened risk of poorer self-regulation including poverty.8 In fact early childhood self-regulatory capacity has been identified as the likely key mechanism through which early life risks including socioeconomic disadvantage lead to poorer academic and well-being outcomes.9 10 Specifically, in the context of poverty, household chaos and stress, children’s physiology and neurobiology may develop in such a way as to limit their capacity for self-regulation development.11 12

Supporting self-regulation development in the years prior to school transition is particularly important. Children with self-regulation difficulties will struggle to pay attention in early learning environments, will remain distressed after negative experiences, will display impulsive behaviours likely to get them in to trouble and will not be able to manage multiple sources of information in complex classrooms. A major problem is that, by school entry, there are already considerable differences in children’s self-regulatory abilities, which are thought to be the primary contributors to socioeconomic-related gaps in school readiness.9 Children who enter school behind in terms of school readiness typically experience ongoing achievement and well-being gaps that the experience of schooling tends to widen rather than close for most students.13

Early intervention to support the development of self-regulation could mediate early socioeconomic risks for children by supporting positive school transition and provide a buffer against poorer academic and mental health outcomes across the school years.2 9 14 A number of curriculum-wide approaches and specific interventions have been implemented and examined for effectiveness. Three preschool curriculum approaches in the USA studied through randomised control trials (RCTs) have shown mixed effects across studies (eg, Tools of the Mind curriculum),15 or positive effects for some self-regulation measures but not others (eg, Head Start Research based developmentally informed (REDI) and Chicago School Readiness Program).16–18 Shorter-term targeted interventions implemented either by teachers or visiting specialists within early childhood education and care and studied in RCTs have included the use of picture books with embedded executive function activities19 and circle games.20 Overall, findings from these specifically designed interventions have been promising but mixed in terms of the effectiveness of the various approaches to impact the various components of self-regulation.

Despite growing evidence about the neurobiological differences underpinning socioeconomic achievement and self-regulation development gradients,1 9 very few interventions have taken a neurobiological approach to addressing early childhood self-regulation. In 2016, we designed and piloted an intervention (called Rhythm and Movement for Self-Regulation (RAMSR)) that aimed to leverage the known neurological benefits of formal music training and clinical applications of music therapy, through delivery in mainstream early childhood education settings by teachers. Distinct synergies across a range of research areas, that we have reviewed elsewhere,21 suggested that a specifically designed rhythm and movement intervention that used rhythmic auditory cueing and focused on beat synchronisation, coordinated rhythmic motor and executive function activities, would have the potential to improve early childhood self-regulatory skills with implications for longer term behavioural and school transition outcomes (see figure 1).

Figure 1

Intervention logic model for Rhythm and Movement for Self-Regulation (RAMSR).

The RAMSR pilot was a quasi-experimental clustered trial in three kindergarten centres in disadvantaged communities, with two classrooms in each centre.22 One classroom in each centre was non-randomly assigned to intervention, and one to control, based on classroom schedules aligned with availability of visiting RAMSR specialists delivering the programme. Results showed positive intervention effects for teacher-reported emotional regulation growth (moderate effect size of 0.35) and the directly assessed executive function of shifting for boys (large effect size of 0.60).22 Fidelity ratings by visiting specialists delivering RAMSR showed that activities were implemented in accordance with the plan for 77%–98% of instances, depending on the activity and child enjoyment was rated as high for 77% of all sessions conducted.

This study will build on this previous trial by investigating the effectiveness of the same intervention as delivered by teachers, rather than visiting specialists. For activities with lower levels of fidelity across the pilot, these were adjusted and redesigned in preparation for this RCT, based on the qualitative notes provided by implementation leaders during the pilot. New evidence that will be produced by this RCT is important to establish if the intervention is to be scaled up and increase its reach with the more sustainable approach of supporting the existing teachers to deliver the programme. While training teachers to deliver interventions with fidelity has challenges,23 this study will use best evidence in teacher professional development24 to ensure fidelity and quality of intervention implementation. Specifically, the training takes an experiential model, followed up with supports including coaching and a community of practice. An implementation science approach will be used to understand the enablers and barriers to teachers implementing the intervention within their usual programming, and what is needed to support their confidence and skill to do so. The research questions for the trial are:

How effective is a short-term (16-20 sessions of 20 minutes each over 8 weeks) rhythm and movement intervention delivered by teachers in improving the self-regulation skills of preschool children (3–4 years old) and are any improvements sustained following the transition to school (4–5 years old)?

How well does the training and resources provided support teachers to implement the programme with fidelity and increase their confidence to practice rhythm and movement activities with young children?

We hypothesise that compared with the control children at 10 weeks and 12 months post baseline, the 8-week RAMSR intervention delivered by teachers in the year prior to school will:

A. Improve children’s self-regulation and executive function skills including components of emotional regulation, attentional regulation, behavioural regulation, classroom regulation and executive functions of shifting, working memory and inhibition.

B. Be related to a range of secondary outcomes for children including improved school readiness and visual-motor integration, fewer behaviour problems and enhanced school transition.

We also expect that compared with teachers not trained in the intervention, teachers trained in RAMSR will:

C. Show an increase in teacher knowledge, confidence, practice and attitudes related to self-regulation and rhythm and movement compared with their baseline measures.

Finally, we hypothesise that:

D. The proposed training and coaching support for teachers will result in high rates of intervention fidelity defined as ratings of ‘implemented according to plan or with planned extensions’ for 80% or more of the implementation instances for each activity across the programme.

Methods

Design

The project will use a balanced-clustered RCT design to follow one cohort of children from kindergarten programme entry (2020) and into the first year of school (Preparatory; 2021).

Setting

In Queensland, Australia, the year prior to formal school commencement is known as kindergarten. Participation rates in this year are over 95% nationally25 and children attend either a long day care centre, with the potential to attend up to 12 hours per day 5 days per week (as enrolled by their family), or a stand-alone kindergarten programme that typically offers either a 5-day fortnight programme (6 hours per day) or a 2-day per week programme with longer days (7.5 hours per day). In stand-alone kindergartens, the same cohort of children is enrolled in each programme, as opposed to long day care where different groups and combinations of children attend on any given day of the week. The national curriculum for the years prior to school, the Early Years Learning Framework,26 guides the play-based approach in both types of programmes. All kindergarten programmes employ a bachelor-qualified teacher and a teaching assistant as well as other inclusion support educators as needed. The adult to child ratio is 1:11, with stand-alone kindergartens generally enrolling up to 22 children per group. Children are typically 3.5–4.5 years at commencement of the kindergarten year and enrol in kindergarten for 12 months.

We will engage with one major early childhood education and care service provider (Childcare & Kindergarten Association; C&K) to support recruitment of kindergartens. C&K, established in 1907, is a Queensland based, large, not-for-profit organisation with 350 kindergartens and childcare centres. C&K manages two types of services—branches and affiliates. Branches are where C&K is the licensee of the service and responsible for the management of staff, workplace issues, insurances, information technology, legislative compliance, buildings and maintenance and funding.27 Affiliate centres have entered into a service agreement with C&K, where C&K distributes funding, provides support and audits compliance obligations on behalf of the Queensland Government.28 C&K is providing no financial or other resources to the project and is not being paid for their collaboration in centre recruitment. A formal research approval process with C&K has been completed.

Centres to be recruited will meet the following criteria: affiliate or branch member with C&K; located within 70 km from Brisbane, Australia; be in a low socioeconomic area as indicated by a score in the bottom three deciles of a national index based on census data that position areas in Australia according to relative socioeconomic advantage and disadvantage29; be in a community area where 2018 Australian Early Development Census data indicate a higher than national average level of child vulnerability in both domains of social competence and emotional maturity30; run a kindergarten programme with the same cohort of children attending at least 2 consecutive days per week (ie, stand-alone kindergarten rather than long day care); have a teacher in the kindergarten programme who is not planning to retire, resign, transfer or take long service leave during the trial period (last quarter 2019–2020); have a typical start-of-year enrolment of at least 80% of capacity in each group (17 children in a group with capacity to take 22).

Kindergarten teacher recruitment

Directors at all eligible centres will be emailed trial information by C&K and invited to complete an expression of interest form, which will collect information further checking on eligibility items (including anticipated teacher employment stability). From those centres who complete an expression of interest, an independent researcher not involved in the study will randomly select the study centres, and teachers within the study centres, using stratification of child enrolment capacity, provided by teachers on the expression of interest form. Some teachers will teach up to 22 children, if they teach in one programme, and up to 44 children, if they teach in two programmes, across the week. If multiple teachers from one centre return an expression of interest, only one teacher from each centre will be randomly selected to reduce the introduction of another level in analyses. The independent researcher will select an even number of teachers with 22 children and teachers with 44 children to ensure a balanced design across two conditions is possible. As well as sociodemographic and context measures (table 1), all teachers will complete a baseline survey collecting information on outcome measures of frequency of music, rhythm and movement practices; confidence in using rhythm and movement; level of knowledge on self-regulation and music and movement for brain development; beliefs about the role of active music engagement for development; training and experience in education and specifically in self-regulation and rhythm and movement (table 2).

Table 1

Sociodemographic, context, education training and intervention fidelity measures to be used in the study

Construct	Measure	Baseline	8 weeks follow-up	12 months follow-up
Sociodemographic characteristics	Educator/teacher: level of education, years of experience, employment status, age, gender	●
	Child/parent: age, gender, language and indigenous background, income bracket, household composition, parental education, child disability or delay	✹
Preschool educator context
Music training background	Study-designed questions on type and years of formal music training as well as music training as part of preservice and in-service professional development (six items)	●
Self-regulation training background	Study-designed questions on type of preservice and in-service professional development in area of self-regulation (four items)	●
Child context measures
Frequency of music-related home learning	Single item about frequency of home adult–child music activities used in prior longitudinal studies35	✹
Attendance at extracurricular music and/or dance	Single item asking about music/dance extracurricular in the last 6 months	✹
Sleep problems	Five items used in prior longitudinal studies36	✹
Physical activity preference and levels	Four items from the Longitudinal Study of Australian Children37—two from each of parents and school teachersParents: one item on a 5-point scale about child enjoyment of physical activity from very much dislikes to very much likes; one item about child’s use of free time with three categories related to whether chooses active, inactive or both pastimes.School teacher: two items asking on a 5-point scale how active child is in organised activities and in play (from a lot less active than most to a lot more active than most)	✹
Intervention feasibility, acceptability and fidelity measures and teacher training/delivery experiences (intervention group only)
Implementation and adjustment record	Sessional checklist against activity plan. Each of the six activities undertaken in each section will require a rating by teachers of either ‘as per plan with or without planned extensions’; ‘as per plan with adjustments’; ‘not implemented’	Throughout programme delivery
Teacher engagement	Sessional checklist on teacher enjoyment and confidence (low, medium, high)	Throughout programme delivery
Child engagement	Session checklist on child attention, enjoyment and participation (low, medium, high)	Throughout programme delivery
Teacher experience training in and delivering the intervention	Individual narrative interview including barriers and facilitators to approach and implementation		●
	Coach observation and coaching discussion notes	Throughout programme training and delivery

◆=direct assessment; ●=preschool educator report; ✹=parent report; =school teacher report.

Table 2

Kindergarten educator outcome measures to be used in the study

Construct	Measure	Baseline	8 weeks follow-up	12 months follow-up
Rhythm and movement practices	14 items related to frequency of use of various music practices in early childhood settings—author devised	●	●
Rhythm and movement confidence	Two items about confidence to use rhythm and movement in (a) a specific session and (b) throughout the day (5-point scale)—author devised	●	●
Knowledge of self-regulation in early childhood	Single item rating confidence (5-point scale)– author devised	●	●
Knowledge of the role of music and movement for brain development	Single item rating confidence (5-point scale)—author devised	●	●
Beliefs about role of music engagement for child development	Ten items including adapted items from Barrett et al38—items selected and created for relevance to child outcomes of self-regulation and executive function and motor development	●	●

●=preschool educator report

Randomisation

Randomisation will occur at the centre level (which is also the teacher level) following recruitment of centres and the teachers within the centre and collection of baseline teacher data. An independent researcher will use a random number generator again stratifying by teacher-provided child enrolment numbers to ensure a balanced number of children in both intervention and control groups. This is because teachers will either teach 22 children or 44 children across a given week depending on their centre or work arrangements as described above. Stratification will mean an equal number of smaller units and larger units will be assigned to each condition to achieve a balanced design. Intervention teachers will then train in programme delivery, practicing with their 2019 preschool cohort. In 2020, a new cohort of preschool children will be enrolled in the centres and invited to participate in the research, meaning randomisation must occur prior to child recruitment and baseline measures.

Intervention training

Teachers in the intervention centres will be provided with intervention materials and professional development in the form of brief self-paced online orientation covering the rationale for the programme; full-day workshop covering self-regulation in early childhood, the theory and rationale for use of rhythm and movement and exposure to all of the intervention materials, microteaching demonstrations of the intervention (teachers act as children so they can experience the activities themselves); a demonstration led by the research team in their centre; independent practice of sessions with their 2019 class; observation and coaching by the research team; and engagement with the online professional learning community for tip sharing and trouble shooting. Prior to the implementation period, an online refresher course will be completed. In 2021, following the completion of data collection, all control teachers will gain access to RAMSR materials and training.

The intervention

RAMSR is designed to be delivered by early childhood practitioners in a group setting with up to 25 children. Teachers will deliver this as part of their usual group floor or circle time within the kindergarten daily routine. Typically, this is held in the morning as a warm up to the day. The RAMSR programme consists of a series of four session plans, with each plan to be repeated daily for 2 weeks. In these settings, because of enrolment patterns, this will mean each child receives the programme four to five times per fortnight, yielding a total of 16–20 sessions available to each child over the 8-week intervention period.

All activities within the session plans are designed to practice key skills of attentional, emotional and behavioural regulation, inhibition, shifting and working memory through embedding these skills in coordinated movement activities enhanced by rhythmic auditory cueing. Common activity elements across the sessions included start/stop (inhibition), reversal of instruction (shifting, for example, move in the silence and freeze in the music), working memory games and beat synchronisation to changing tempos. Original backing tracks provided rhythmic auditory cueing and leverage rhythmic entrainment principles to stimulate more coordinated movement.

Within each session plan, there are a series of activities with the above key elements represented in each (1) warm-up involving body percussion, (2) becoming familiar involving an adaptation of a familiar early childhood song, (3) moving to the beat involving large gross motor movements, (4) playing to the beat involving simple rhythm sticks or castanets, (5) dancing to the beat involving slightly more complex gross motor movement patterns to activity three of the session and often involving visual-motor skills and coordination such as mirroring the shape of rhythm sticks on the floor with bodies and (6) calming, which includes a series of movements and then stillness accompanied by relaxation music to support physiological entrainment to a calmer state, targeting embodied emotional regulation. Teachers are provided with each session plan, a series of videos demonstrating the plans, all audio tracks required to run the activities and visual cue cards needed for some activities. Rhythm sticks and animal castanets required to implement the sessions are provided. Further and regularly updated information on RAMSR, including training approaches and opportunities, can be found at https://ramsrblog.wordpress.com/.

Child recruitment and baseline measures

Teachers will invite all children enrolled and commencing the 2020 kindergarten year between 28 January 2020 and 21 February 2020 (first 4 weeks of the kindergarten year) to participate in the research through gaining parental consent. Validated baseline self-regulation measures (parent and teacher report and direct assessments with children) will be taken with all children prior to the intervention/control period (baseline; see table 3). Assessors will visit kindergartens and withdraw children to undertake assessments and will be blind to group assignment. Assessors will visit centres in pairs, with each child working with each assessor for a 15-minute session, splitting the tasks into two sessions. Kindergarten teachers will provide checklist measures of children and will not be blind to group assignment.

Table 3

Child outcome measures to be used in the study

Construct	Components	Measure	Baseline	8 weeks follow-up	12 months follow-up
Primary outcomes
Executive function (factor score derived from latent variable modelling estimates—continuous)	Working memoryInhibitory controlAttentional shifting	Three short iPad tasks from the Early Years Toolbox39:Mr Ant (visual-spatial working memory): participants remember the spatial locations of ‘stickers’ placed on a cartoon ant and identify these locations after a brief retention interval;Go/No-Go (inhibition): participants respond to ‘go’ trials (catch fish) and withhold on ‘no-go’ trials (avoid sharks).Card-Sorting (shifting): participants sort cards by one sorting dimension first (eg, colour) before switching to sorting by a second dimension (eg, shape).	◆	◆
Self-regulation (factor score derived from exploratory factor analysis of components—continuous)	Behavioural regulation	Head Toes Knees Shoulders Task40: a game whereby children do the opposite of what the researcher says (eg, touch toes when asked to touch their head). A measure of inhibitory control (a child must inhibit the dominant response), working memory (a child must remember the rules of the task) and attention focusing (must focus attention to the directions being presented).	◆	◆
		Child Self-Regulation and Behaviour Questionnaire (CSBQ), Behavioural Self-Regulation subscale. From the Early Years Toolbox39: five items, each on a scale from 1 (not true) to 5 (certainly true).	●	●
	Emotional regulation	CSBQ Emotional Self-Regulation subscale. From the Early Years Toolbox39: six items, each on a scale from 1 (not true) to 5 (certainly true).	●	●
	Cognitive/attentional regulation	CSBQ Cognitive Self-Regulation subscale. From the Early Years Toolbox39: five items, each on a scale from 1 (not true) to 5 (certainly true).	●	●
	Classroom self-regulation	Child Behaviour Rating Scale.41 Teacher-report measure of self-regulation behaviours within the classroom. 10 items rated on a Likert scale from 1 (never) to 5 (always).	●	●
Secondary outcomes
School readiness (single raw score—continuous).		Bracken School Readiness Assessment—Third Edition,42 comprises six subtests (colours, letters, numbers/counting, sizes, comparisons and shapes), assesses knowledge of concepts traditionally taught in preparation for formal education.	◆	◆
Visual-motor integration (single raw score—continuous).		Design Copy task from the Early Screening Inventory.43 A visual-motor task requiring children to use a pencil to copy geometric shapes pictured on cards such as a square or circle.	◆	◆
Academic and developmental competence (composite score—continuous)		Eight items from LSAC comparing how competent child is in various academic and developmental areas, rated on a 5-point scale from much less competent to much more competent.
Behaviour problems (total score—continuous)		Strengths and Difficulties Questionnaire44:25-item validated measure assessing child’s socioemotional behaviour, including five scales: hyperactivity/inattention, conduct problems, emotional symptoms, peer relationship problems, and prosocial behaviour.
School transition (dichotomised to difficult/average or with ease—binary)		Single item from LSAC comparing how study child has transitioned to school compared with peers. 5-point scale from with much more difficulty, to with much more ease than other children.

◆=direct assessment; ●=preschool educator report; ✹=parent report; =school teacher report.

LSAC, Longitudinal Study of Australian Children.

Intervention delivery

In term 1, teachers will undertake a brief refresher training seminar (2 hours) prior to commencing delivery of the programme 2-3 times weekly for 8 weeks. Teachers will access ongoing support through regular phone contact and access to the closed online professional learning community. Once every 2 weeks, a research team member will visit to observe the teacher delivering the session, to take fidelity measures and to provide coaching. Coaching will follow protocol by Hemmeter et al.31 Each postsession reflection will involve: open, summarise observation and encourage reflection; supportive performance feedback; corrective performance feedback; targeted support; support for planned actions; end meeting. A summary of each verbal coaching session will be provided via email to teachers and this will become a source of research data to address our second research question. Teachers (and coaches when observing) will provide fidelity checklist information following the completion of each session, which will collect data on: adherence to the session plan; level of child engagement in sessional activities as a measure of participant responsiveness; attendance data of children to determine dosage. The research team lead will also make additional visits to all pairs of teachers and coaches to collect additional independent fidelity checklist information. Programme differentiation across the control and intervention groups will be ascertained through examination of baseline and follow-up data collected on teacher surveys regarding the frequency of use of rhythmic movement sessions in kindergartens.

Follow-up

Follow-up data collection will occur at the end of the 8-week intervention period, and 12 months after baseline, after children have transitioned to school (table 2). All participating families will be telephoned early in 2021, when most children will be enrolled in Prep (first year of full-time schooling in Queensland). Parents will be asked to provide contact details for their child’s school and current teacher and to confirm consent for the research team to contact the school. Prep teachers will then be asked to complete the self-regulation measure for each child (paper form delivered to the school), providing follow-up data for children following school transition. School teachers will be blind to group assignment. Teacher report has been selected as the only data collection approach at the 12-month follow-up period, rather than a repeat of direct child assessments undertaken at baseline and 8-week follow-up. This is because it is anticipated that study children will attend up to 50 different schools spread across a wide geographic region and it is not feasible within financial constraints of the study to undertake direct child assessments. However, as depicted in table 3, four of the teacher-report measures are repeated across all three time points, which will allow for some consistency in the analyses.

Measures

The measures used throughout the study are summarised in tables 1–3. Measures have been selected with reference to the known psychometric properties and feasibility of measures in low socioeconomic kindergarten settings, many of which were used in the pilot study for the current trial.22 The project lead will provide training for face-to-face measures to the data collection team. The training will involve familiarisation with the measure’s components and how they are administered. Mock assessments will be conducted to further familiarise the staff in the presence of the trainer. The lead researcher will also observe each assessor once in the first week of data collection, and ongoing troubleshooting meetings will be held to ensure fidelity.

All electronic and paper data will be collected against a unique digital identifier for each participant. Data will be directly uploaded to a database for the three iPad tasks. The Design Copy task will be double scored (blind) by the lead author and a single research assistant, with inter-rater reliability calculated. For the two other child assessment measures, data will be collected through data collection paper forms. Data entry will be managed by a single data entry research assistant with a 10% random selection of forms for each measure double checked by the lead author. Confidentiality is ensured through storage of all data against numeric identifier codes only. The identification key will be stored separately and only accessible by the lead researcher and senior research assistant.

Sample size

Children: pilot study estimates have been used for power and sample size calculations. Assuming a simple sampling design with no clustering, calculation in G*Power indicates a required sample size of 76 to detect small intervention effects (0.14) with a power of 0.8 using the planned analytic approach (path analysis equivalent to multiple regression). The balanced cluster design of the RCT produces a design effect of up to 1.9 (using average intra-class correlation coefficients for same measures used in the pilot of 0.03 and average cluster size of 33), increasing the effective sample size to 144. Using the 2016 pilot response rates at similar centres as a guide, a sufficient final sample of at least 144 at the 12 month follow-up time point will be achieved by recruiting a minimum of 200 children at baseline (allowing for a 15% attrition rate at each of the two follow-up time points).

Teachers: with only up to eight teachers involved in the study, split across intervention and control, the study is underpowered to address hypothesis C using significance testing. Instead, we will use a match case-series approach and descriptive statistics to take an exploratory approach to understanding any baseline similarities and differences in the teacher constructs among intervention teachers and matched control teachers and change scores in constructs across baseline to follow-up.

Statistical analyses

The efficacy of the intervention will be evaluated within a structural equation modelling framework (using MPlus) with an intention-to-treat approach, which will allow for: precision in the testing of intervention effects on the outcome measures across the intervention and control groups while controlling for baseline scores and covariates; handling of missing data using full information maximum likelihood and accounting for the clustered design.32 To reduce the number of analyses undertaken, multiple measures for each construct will be reduced to single scores using appropriate approaches for each as shown in table 3. For primary outcomes (executive function and self-regulation) and the secondary outcomes measured equivalently at baseline and 8 weeks later (school readiness and visual-motor integration), four separate path analyses (equivalent to multiple regression) will be used with effect sizes computed using formulas for independent groups pre–post designs.33 To examine 12-month follow-up data, latent curve modelling for pre–post-post designs will also be used to examine intervention effects across baseline to postintervention to follow-up34 for self-regulation factor scores that are equivalently measured at three time points. For the secondary outcomes measured only at 12-month follow-up (academic competence, behaviour problems and school transition), path models examining the effect of treatment condition on these outcomes, controlling for baseline measures and mediated by 8- week follow-up measures will be developed. Clustering will be accounted for at the centre level. Covariates will be selected from child gender and age, level of family income, parental education, non-English speaking status and aboriginal status. Selection will be based on consistency and significance of bivariate correlations among these covariates and outcomes measures.

The first phase of analysis will be undertaken once baseline and postintervention data collection is complete. A second phase of analysis will be completed once the 12-month follow-up data collection is complete.

Participant and public involvement

Participants and the public were not involved in the design or reporting of this research protocol and will not be involved in the design, reporting and dissemination of the trial.

Discussion

A positive transition to school provides children with an important advantage in terms of student–teacher and peer relationships and future academic success. A key feature of school readiness is the ability to regulate one’s own emotions, cognitions and behaviour. Self-regulatory growth in early childhood is a key indicator of children’s capacity to learn and thrive in environments such as school and is linked to better life outcomes more broadly, including educational achievement, employment and well-being. Importantly, children from disadvantaged backgrounds may experience early home environments that are less conducive to self-regulatory growth, which confers vulnerability to poor school transition and subsequently poorer learning and well-being trajectories. With research showing that almost a third of Australian children start school with poor self-regulation skills which can lead to poor life outcomes, it is imperative that this issue is addressed.

RAMSR aims to combine the researched benefits of music education and music therapy, to build the underlying neural pathways that support self-regulatory skills in young children. The initial outcomes of this programme will present as teacher-reported improvements in self-regulation in the form of emotional, attentional and general classroom regulation and improved assessed behavioural regulation and executive functioning. Important secondary benefits will include improved school readiness and transition, learning competency and academic achievement and enhanced kindergarten teacher knowledge and self-efficacy related to rhythm and movement and self-regulation.

Other important attributes of the RAMSR programme are its low cost and accessibility, making it viable for all preschools to use in their everyday programmes. Teachers, even those who consider themselves to be ‘non-musical’, can implement the programme through a structured and accessible training procedure. Once the programme is trialled, if proven to be effective, it is anticipated that RAMSR will be able to be scaled up to a range of early childhood settings and translated internationally. Further, the study will contribute important information about the particular barriers and facilitators that early educators face in the implementation of specific intervention programmes as they aim to scale up. Increased understanding of implementation factors will be of benefit to educational intervention designers that seek to embed enablers and address potential barriers as part of design and implementation processes.

Ethics and dissemination

Ethics approval has been granted by the Queensland University of Technology Human Research Ethics Committee, approval 1900000566. During the trial, only the named investigators, senior research assistant, and research student on the project will have access to the dataset. An authorship plan has been negotiated with all project team members. Findings from this project will be disseminated through in-field workshops to key early childhood service providers; national and international conference presentations; academic journal publications and professional early childhood publications. A research brief summarising the findings will be disseminated to participating research sites, along with the research partner, C&K Association and peak bodies Early Childhood Australia and The Australian Music Therapy Association. Any changes to this protocol will be updated through the trial registration and communicated with all investigators and participants.