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William V Massey

Datos Biográficos

ID189942
NOMBREWilliam V Massey
NOMBRESWilliam V
APELLIDOMassey
FIRMAMASSEY W V
AFILIACIONESOregon State University
ORCID0000-0002-4002-3720
VERIFICADOSí
TOTAL DE OBRAS27
TOTAL DE CITAS3
TOTAL COMO AUTOR26
TOTAL COMO EDITOR1
PRIMER AÑO DE PUBLICACIÓN2016
AÑO MÁS RECIENTE DE PUBLICACIÓN2026
ÍNDICE H1
  • The Effect of Outdoor Play, Physical Activity, and Screen Time Use on the Emotional Wellbeing of Children and Youth during a Health Crisis

    Lydia Gorrell, Xiangyou Shen et al.•ARTICLE•Leisure Sciences•2026•Citada por: 2•Referencias: 61

    Long-standing research has highlighted the critical role of physical and outdoor activities for children's health and wellbeing. During the COVID-19 pandemic, children around the world experienced heightened stress and poor mental health, which coincided with a decrease in active play and increase in screen-based activities. This study examined how physical, outdoor, and screen-based activities impacted emotional wellbeing during the post-lockdow…

  • Does Appearance Matter? Students' Perceived Body Size, Physical Appearance, and Attraction to Physical Activity at Recess

    Open Access•Danielle J Belcher, Megan Babkes Stellino et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Various psychosocial variables are critical predictors of students' recess experiences. It is still relatively unknown how self-perceptions of bullying and body size impact recess physical activity (PA) for certain groups of students. The purpose of this study was to examine group differences and relationships in levels of appearance-related victimization, physical self-perceptions, and attraction to PA at recess among various self-id…

  • A Call for States to Level the Playing Field in School Recess

    Open Access•William V Massey, Catherine L Ramstetter et al.•ARTICLE•Journal of School Health•2025

    The authors declare no conflicts of interest

  • Toward a Trauma‐Informed Comprehensive School Physical Activity Program

    Open Access•E Kroshus, Kiana Hafferty et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Many students would benefit from trauma-informed physical activity (PA); however, there is a lack of systematic guidance on incorporating trauma-informed practices across school-based PA opportunities. The purpose of this study was to generate a feasible framework for trauma-informed school-based PA. METHODS: Framework development was guided by a modified Delphi approach, including an exploration phase and an evaluation phase. First, …

  • The Role of Adult Support in Mitigating Students' Feelings of Unwelcomeness at Recess

    Open Access•Jim P Arnold, Megan Babkes Stellino et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Researchers have documented that recess quality is critical to understanding outcomes, with supportive adults and positive peer interactions being critical components. The purpose of this study was to examine the experiences of students feeling unwelcome or uncomfortable during recess and to examine how perceptions of adult support impact those experiences. METHODS: A total of 483 elementary school students were surveyed at four time …

  • Creating Lasting Conditions for Meaningful Recess Reform

    Open Access•Rebecca A London, Gabriella Alvarez et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: When well implemented, recess is a critical part of the school day for children's healthy development. We explored the implementation of a recess improvement process in 5 elementary schools across 3 states. METHODS: We conducted a mixed-methods implementation study in which we visited each school 3 times over 1 school year, collecting observational, interview, survey, and focus group data. Qualitative data were coded thematically and …

  • Association between motor skills and executive function of children with autism spectrum disorder in Taiwan and the United States

    Open Access•Ming-Chih Sung, Ming‐Chih Sung et al.•ARTICLE•Frontiers in Public Health•2024

    Objective The purpose of this study was to examine the relationship between parent ratings of motor skills and executive function (EF) in children with autism spectrum disorder (ASD) in the United States and Taiwan. Materials and method One hundred and seventy-two parents/legal guardians of children (4–6 years and 11 months old) with ASD were recruited from two countries, Taiwan ( n = 100) and the United States ( n = 72). The parents or guardians…

  • Improving Recess through Collaboration

    Open Access•Jim P Arnold, Anna Farello et al.•ARTICLE•Journal of School Health•2024

    BACKGROUND: School recess quality is vital to children's social and emotional skill development. However, there is a research-to-practice gap where academic findings are ineffectively translated back to schools. The aims of this study were to examine how a co-designed intervention would impact negative behaviors observed during recess and to explore the facilitators and barriers to recess implementation over the course of a school year. METHODS: …

  • Fighting forward

    William V Massey, Meredith A Whitley•ARTICLE•Qualitative Research in Sport and…•2024

    Narratives of sport as ‘a way out’ for young people from oppressed backgrounds tend to be over-simplified and linear, with critiques about perceptions of sport as ‘mythopoeic’, and able to overcome the environmental, social, and cultural forces and discourses at play. And yet, narratives of success through sport might be the most accessible for those from oppressed backgrounds or identity groups, where their future stories might be told. This dic…

  • Recess in the 21st Century Post‐Covid World

    Open Access•Global Recess Alliance, Catherine L Ramstetter et al.•ARTICLE•Journal of School Health•2022

    The abrupt onset of the COVID-19 pandemic forced the world into frenzied action, creating a series of ongoing stressors: school/work closings, remote learning, canceled events, family strife, fear, and a significant loss of social interactions. It is now unsurprising to learn that children's mental health has suffered. As social connection is tightly entwined with children's mental health, supporting school-based spaces for quality social interac…

  • Parents’ perceptions of school recess policies and practices

    Open Access•Isabella Ozenbaugh, Janelle Thalken et al.•ARTICLE•BMC Public Health•2022

    Results show that parents of children with a disability perceive a different recess experience for their child that involves more instances of victimization compared to parents of typically developing children. Based on these findings, school, district, and state policy makers could consider ensuring that recess includes multiple activities, is supervised by adults, and is a space where conflict resolution occurs, for creating a more inclusive en…

  • Nowhere to Go

    Open Access•Deanna Perez, Janelle Thalken et al.•ARTICLE•Frontiers in Public Health•2021

    Background: Schools and outdoor public spaces play a substantial role in children's physical activity. Yet, the COVID-19 shelter-in-place mandates bound many children to their available home spaces for learning, movement, and development. The exact effect this mandate had on children's physical activity may vary among families. Objective: To understand, from the perspective of parents, how the COVID-19 shelter-in-place mandates affected children'…

  • Recess Quality and Social and Behavioral Health in Elementary School Students

    Open Access•William V Massey, Janelle Thalken et al.•ARTICLE•Journal of School Health•2021

    BACKGROUND: A majority of research findings have focused on recess as instrumental to achieving minutes of physical activity rather than focusing on the psycho-social benefits associated with a high-quality recess environment. The purpose of the current study was to examine the relationship between recess quality and teacher-reported social, emotional, and behavioral outcomes in children. METHODS: Data were collected from 26 schools in 4 differen…

  • Recess as a practical strategy to implement the Whole School, Whole Community, Whole Child model in schools

    Open Access•Gabriella M McLoughlin, William V Massey et al.•ARTICLE•Health Education Journal•2021

    Objectives: Schools can provide an optimal environment for promoting children’s health behaviours. The Whole School, Whole Community, Whole Child (WSCC) model addresses 10 aspects of the school environment that can be used to promote student health behaviours and academic outcomes: namely, Health Education; Nutrition Environment and Services; Employee Wellness; Social and Emotional School Climate; Physical Environment; Health Services; Counsellin…

  • Observations from the playground

    Open Access•William V Massey, Deanna Perez et al.•ARTICLE•Health Education Journal•2021

    Objective: This study aimed to examine some common problems observed during school recess and translate findings to evidence-based, practical solutions that can be applied within schools on a more systematic level. Design: Observational study. Setting: Elementary schools in the USA. Method: Data were collected from 112 school recess periods at 25 public elementary schools in three distinct geographical regions of the USA (Midwest, Northwest, Sout…

  • A critical examination of school-based recess

    William V Massey, William Massey et al.•ARTICLE•Qualitative Research in Sport and…•2020

    Over the past decade, much attention has been paid to school-based recess and the implications of recess on child development. Large and influential groups such as the American Academy of Paediatrics (2012), the Centers for Disease Control (2017), and SHAPE America (2017) have cited recess as a crucial component to the school day, noting the potential cognitive, academic, social, emotional, and physical benefits. Although recess has been conceptu…

  • An observational study of recess quality and physical activity in urban primary schools

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•BMC Public Health•2020

    Results of the current study showed that the quality of the recess environment, and the interactions of both adults and students in that environment, need to be taken into consideration in future school-based recess studies

  • The Talent Paradox

    William V Massey, Meredith A Whitley•ARTICLE•Sociology of Sport Journal•2020•Citada por: 1•Referencias: 12

    Previous researchers have demonstrated that sport participation can be a place of purpose, a place of celebrated deviance, and/or a value-neutral endeavor for children who have experienced developmental trauma. While previous research has focused primarily on sport as a positive influence, the purpose of this paper is to examine where disillusionment, disengagement, and damage occur through participation in sport. This study was guided by a const…

  • Sporting Activities for Individuals Who Experienced Trauma During Their Youth

    Open Access•William V Massey, Toni L Williams•ARTICLE•Qualitative Health Research•2020•Referencias: 63

    The purpose of this study was to critically examine the qualitative research on childhood trauma survivors' experiences of sporting activities. A comprehensive search of health and social science databases, manual journal searches, and contact with experts yielded 7,395 records. Full-text screening resulted in a final sample of 16 studies. Meta-study methodology was used as a diagnostic tool to rigorously analyze the theory, methods, and findings…

  • Examination of the Responsiveness of the Great Recess Framework—Observational Tool

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•International Journal of…•2019

    The purpose of this study was to test the responsiveness of the great recess framework-observational tool (GRF-OT) to detect changes in recess quality. GRF-OT data were collected at two time points (fall 2017 and spring 2018) in four geographically distinct regions of the United States. Following recommendations by Massey et al. (2018), a three-day average of recess observations was used for each data point. Data analysis was conducted on nine sc…

  • Sport in Under-resourced, Underdeveloped, and Conflict Regions

    Meredith A Whitley, William V Massey et al.•BOOK•Sport in Underdeveloped and…•2018

  • Navigating tensions in qualitative research

    Meredith A Whitley, William V Massey•ARTICLE•Qualitative Research in Sport and…•2018

    Increasingly, qualitative researchers are merging methods, processes and principles from multiple methodologies in all stages of a research study. Naturally, this brings tensions into the research process, with concerns about the integration (and/or lack of attention) of distinct historical, epistemological and theoretical approaches. While there is an emerging discourse connected to these methodological tensions, this often overlooks other tensi…

  • Development of the great recess framework – observational tool to measure contextual and behavioral components of elementary school recess

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•BMC Public Health•2018

    Initial evidence for a valid, and reliable, assessment tool to observationally measure the recess environment with a specific focus on safety, resources, student engagement, adult engagement, pro-social/anti-social behavior, and student empowerment was established in this study. Use of the GRF-OT can inspire evaluation, and subsequent intervention, to strategically create consistent, appropriate, and engaging school recess that impact children's …

  • The role of sport for youth amidst trauma and chaos

    William V Massey, Meredith A Whitley•ARTICLE•Qualitative Research in Sport and…•2016

    Sport remains a huge draw for young people, with the dominant narrative remaining one of sport for good. However, it is likely that alternative narratives exist, particularly as the role of sport in development is complex and multi-faceted. Moreover, within the dominant narrative that proposes the use of sport for positive development, how sport contributes to developmental outcomes over time, and what impact sport has on various life domains rem…

  • Changing methods and methods of change

    C Darnell, Simon C Darnell et al.•ARTICLE•Qualitative Research in Sport and…•2016

    This collection of papers is made up of diverse, contemporary, and thought-provoking examples of qualitative methods in the study of Sport for Development and Peace (SDP). In this conclusion, we reflect on some of the key themes that cut across the contributions. Four main topics are discussed: Interpretation (the subjects and voices at the centre of SDP research), Outcomes (the variety of results that are likely to emerge from SDP research), Cre…

Siguiente
  • The Effect of Outdoor Play, Physical Activity, and Screen Time Use on the Emotional Wellbeing of Children and Youth during a Health Crisis

    Lydia Gorrell, Xiangyou Shen et al.•ARTICLE•Leisure Sciences•2026•Citada por: 2•Referencias: 61

    Long-standing research has highlighted the critical role of physical and outdoor activities for children's health and wellbeing. During the COVID-19 pandemic, children around the world experienced heightened stress and poor mental health, which coincided with a decrease in active play and increase in screen-based activities. This study examined how physical, outdoor, and screen-based activities impacted emotional wellbeing during the post-lockdow…

  • The Talent Paradox

    William V Massey, Meredith A Whitley•ARTICLE•Sociology of Sport Journal•2020•Citada por: 1•Referencias: 12

    Previous researchers have demonstrated that sport participation can be a place of purpose, a place of celebrated deviance, and/or a value-neutral endeavor for children who have experienced developmental trauma. While previous research has focused primarily on sport as a positive influence, the purpose of this paper is to examine where disillusionment, disengagement, and damage occur through participation in sport. This study was guided by a const…

  • The role of sport for youth amidst trauma and chaos

    William V Massey, Meredith A Whitley•ARTICLE•Qualitative Research in Sport and…•2016

    Sport remains a huge draw for young people, with the dominant narrative remaining one of sport for good. However, it is likely that alternative narratives exist, particularly as the role of sport in development is complex and multi-faceted. Moreover, within the dominant narrative that proposes the use of sport for positive development, how sport contributes to developmental outcomes over time, and what impact sport has on various life domains rem…

  • Changing methods and methods of change

    C Darnell, Simon C Darnell et al.•ARTICLE•Qualitative Research in Sport and…•2016

    This collection of papers is made up of diverse, contemporary, and thought-provoking examples of qualitative methods in the study of Sport for Development and Peace (SDP). In this conclusion, we reflect on some of the key themes that cut across the contributions. Four main topics are discussed: Interpretation (the subjects and voices at the centre of SDP research), Outcomes (the variety of results that are likely to emerge from SDP research), Cre…

  • ‘Greatness (un)channelled’

    Meredith A Whitley, William V Massey et al.•ARTICLE•Qualitative Research in Sport and…•2016

    Within under-resourced urban communities, sport is a huge draw for many young males, with a commonly shared belief that sport can lead to a better life. However, there is a paucity of research examining the experience of elite athletes from under-resourced areas. Additionally, there has been insufficient research that examines the interrelated systems impacting youth development (e.g. individuals, families, neighbourhoods, schools), which is need…

  • Sport in under-resourced, underdeveloped, and conflict regions

    William V Massey, Meredith A Whitley et al.•ARTICLE•Qualitative Research in Sport and…•2016

    More than 600 Sport for Development and Peace (SDP) programmes are currently registered on the International Platform on Sport and Development (sportanddev.org) and over the past two decades, schol

  • Sport in Under-resourced, Underdeveloped, and Conflict Regions

    Meredith A Whitley, William V Massey et al.•BOOK•Sport in Underdeveloped and…•2018

  • Navigating tensions in qualitative research

    Meredith A Whitley, William V Massey•ARTICLE•Qualitative Research in Sport and…•2018

    Increasingly, qualitative researchers are merging methods, processes and principles from multiple methodologies in all stages of a research study. Naturally, this brings tensions into the research process, with concerns about the integration (and/or lack of attention) of distinct historical, epistemological and theoretical approaches. While there is an emerging discourse connected to these methodological tensions, this often overlooks other tensi…

  • Development of the great recess framework – observational tool to measure contextual and behavioral components of elementary school recess

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•BMC Public Health•2018

    Initial evidence for a valid, and reliable, assessment tool to observationally measure the recess environment with a specific focus on safety, resources, student engagement, adult engagement, pro-social/anti-social behavior, and student empowerment was established in this study. Use of the GRF-OT can inspire evaluation, and subsequent intervention, to strategically create consistent, appropriate, and engaging school recess that impact children's …

  • Examination of the Responsiveness of the Great Recess Framework—Observational Tool

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•International Journal of…•2019

    The purpose of this study was to test the responsiveness of the great recess framework-observational tool (GRF-OT) to detect changes in recess quality. GRF-OT data were collected at two time points (fall 2017 and spring 2018) in four geographically distinct regions of the United States. Following recommendations by Massey et al. (2018), a three-day average of recess observations was used for each data point. Data analysis was conducted on nine sc…

  • A critical examination of school-based recess

    William V Massey, William Massey et al.•ARTICLE•Qualitative Research in Sport and…•2020

    Over the past decade, much attention has been paid to school-based recess and the implications of recess on child development. Large and influential groups such as the American Academy of Paediatrics (2012), the Centers for Disease Control (2017), and SHAPE America (2017) have cited recess as a crucial component to the school day, noting the potential cognitive, academic, social, emotional, and physical benefits. Although recess has been conceptu…

  • An observational study of recess quality and physical activity in urban primary schools

    Open Access•William V Massey, Megan Babkes Stellino et al.•ARTICLE•BMC Public Health•2020

    Results of the current study showed that the quality of the recess environment, and the interactions of both adults and students in that environment, need to be taken into consideration in future school-based recess studies

  • The Talent Paradox

    William V Massey, Meredith A Whitley•ARTICLE•Sociology of Sport Journal•2020•Citada por: 1•Referencias: 12

    Previous researchers have demonstrated that sport participation can be a place of purpose, a place of celebrated deviance, and/or a value-neutral endeavor for children who have experienced developmental trauma. While previous research has focused primarily on sport as a positive influence, the purpose of this paper is to examine where disillusionment, disengagement, and damage occur through participation in sport. This study was guided by a const…

  • Sporting Activities for Individuals Who Experienced Trauma During Their Youth

    Open Access•William V Massey, Toni L Williams•ARTICLE•Qualitative Health Research•2020•Referencias: 63

    The purpose of this study was to critically examine the qualitative research on childhood trauma survivors' experiences of sporting activities. A comprehensive search of health and social science databases, manual journal searches, and contact with experts yielded 7,395 records. Full-text screening resulted in a final sample of 16 studies. Meta-study methodology was used as a diagnostic tool to rigorously analyze the theory, methods, and findings…

  • Nowhere to Go

    Open Access•Deanna Perez, Janelle Thalken et al.•ARTICLE•Frontiers in Public Health•2021

    Background: Schools and outdoor public spaces play a substantial role in children's physical activity. Yet, the COVID-19 shelter-in-place mandates bound many children to their available home spaces for learning, movement, and development. The exact effect this mandate had on children's physical activity may vary among families. Objective: To understand, from the perspective of parents, how the COVID-19 shelter-in-place mandates affected children'…

  • Recess Quality and Social and Behavioral Health in Elementary School Students

    Open Access•William V Massey, Janelle Thalken et al.•ARTICLE•Journal of School Health•2021

    BACKGROUND: A majority of research findings have focused on recess as instrumental to achieving minutes of physical activity rather than focusing on the psycho-social benefits associated with a high-quality recess environment. The purpose of the current study was to examine the relationship between recess quality and teacher-reported social, emotional, and behavioral outcomes in children. METHODS: Data were collected from 26 schools in 4 differen…

  • Recess as a practical strategy to implement the Whole School, Whole Community, Whole Child model in schools

    Open Access•Gabriella M McLoughlin, William V Massey et al.•ARTICLE•Health Education Journal•2021

    Objectives: Schools can provide an optimal environment for promoting children’s health behaviours. The Whole School, Whole Community, Whole Child (WSCC) model addresses 10 aspects of the school environment that can be used to promote student health behaviours and academic outcomes: namely, Health Education; Nutrition Environment and Services; Employee Wellness; Social and Emotional School Climate; Physical Environment; Health Services; Counsellin…

  • Observations from the playground

    Open Access•William V Massey, Deanna Perez et al.•ARTICLE•Health Education Journal•2021

    Objective: This study aimed to examine some common problems observed during school recess and translate findings to evidence-based, practical solutions that can be applied within schools on a more systematic level. Design: Observational study. Setting: Elementary schools in the USA. Method: Data were collected from 112 school recess periods at 25 public elementary schools in three distinct geographical regions of the USA (Midwest, Northwest, Sout…

  • Recess in the 21st Century Post‐Covid World

    Open Access•Global Recess Alliance, Catherine L Ramstetter et al.•ARTICLE•Journal of School Health•2022

    The abrupt onset of the COVID-19 pandemic forced the world into frenzied action, creating a series of ongoing stressors: school/work closings, remote learning, canceled events, family strife, fear, and a significant loss of social interactions. It is now unsurprising to learn that children's mental health has suffered. As social connection is tightly entwined with children's mental health, supporting school-based spaces for quality social interac…

  • Parents’ perceptions of school recess policies and practices

    Open Access•Isabella Ozenbaugh, Janelle Thalken et al.•ARTICLE•BMC Public Health•2022

    Results show that parents of children with a disability perceive a different recess experience for their child that involves more instances of victimization compared to parents of typically developing children. Based on these findings, school, district, and state policy makers could consider ensuring that recess includes multiple activities, is supervised by adults, and is a space where conflict resolution occurs, for creating a more inclusive en…

  • Association between motor skills and executive function of children with autism spectrum disorder in Taiwan and the United States

    Open Access•Ming-Chih Sung, Ming‐Chih Sung et al.•ARTICLE•Frontiers in Public Health•2024

    Objective The purpose of this study was to examine the relationship between parent ratings of motor skills and executive function (EF) in children with autism spectrum disorder (ASD) in the United States and Taiwan. Materials and method One hundred and seventy-two parents/legal guardians of children (4–6 years and 11 months old) with ASD were recruited from two countries, Taiwan ( n = 100) and the United States ( n = 72). The parents or guardians…

  • Improving Recess through Collaboration

    Open Access•Jim P Arnold, Anna Farello et al.•ARTICLE•Journal of School Health•2024

    BACKGROUND: School recess quality is vital to children's social and emotional skill development. However, there is a research-to-practice gap where academic findings are ineffectively translated back to schools. The aims of this study were to examine how a co-designed intervention would impact negative behaviors observed during recess and to explore the facilitators and barriers to recess implementation over the course of a school year. METHODS: …

  • Fighting forward

    William V Massey, Meredith A Whitley•ARTICLE•Qualitative Research in Sport and…•2024

    Narratives of sport as ‘a way out’ for young people from oppressed backgrounds tend to be over-simplified and linear, with critiques about perceptions of sport as ‘mythopoeic’, and able to overcome the environmental, social, and cultural forces and discourses at play. And yet, narratives of success through sport might be the most accessible for those from oppressed backgrounds or identity groups, where their future stories might be told. This dic…

  • Does Appearance Matter? Students' Perceived Body Size, Physical Appearance, and Attraction to Physical Activity at Recess

    Open Access•Danielle J Belcher, Megan Babkes Stellino et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Various psychosocial variables are critical predictors of students' recess experiences. It is still relatively unknown how self-perceptions of bullying and body size impact recess physical activity (PA) for certain groups of students. The purpose of this study was to examine group differences and relationships in levels of appearance-related victimization, physical self-perceptions, and attraction to PA at recess among various self-id…

  • A Call for States to Level the Playing Field in School Recess

    Open Access•William V Massey, Catherine L Ramstetter et al.•ARTICLE•Journal of School Health•2025

    The authors declare no conflicts of interest

  • Toward a Trauma‐Informed Comprehensive School Physical Activity Program

    Open Access•E Kroshus, Kiana Hafferty et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Many students would benefit from trauma-informed physical activity (PA); however, there is a lack of systematic guidance on incorporating trauma-informed practices across school-based PA opportunities. The purpose of this study was to generate a feasible framework for trauma-informed school-based PA. METHODS: Framework development was guided by a modified Delphi approach, including an exploration phase and an evaluation phase. First, …

  • The Role of Adult Support in Mitigating Students' Feelings of Unwelcomeness at Recess

    Open Access•Jim P Arnold, Megan Babkes Stellino et al.•ARTICLE•Journal of School Health•2025

    BACKGROUND: Researchers have documented that recess quality is critical to understanding outcomes, with supportive adults and positive peer interactions being critical components. The purpose of this study was to examine the experiences of students feeling unwelcome or uncomfortable during recess and to examine how perceptions of adult support impact those experiences. METHODS: A total of 483 elementary school students were surveyed at four time …

Psychology (22 obras) · Medicine (20 obras) · Developmental psychology (10 obras) · Social Psychology (10 obras) · Sociology (10 obras) · Political science (9 obras) · Medical education (8 obras) · Youth Development and Social Support (7 obras) · Early Childhood Education and Development (6 obras) · Obesity, Physical Activity, Diet (6 obras)

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