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Dr George Thomas
Dr

George Thomas

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Overview

Background

Dr George Thomas is a Post Doctoral Research Fellow in the Health and Wellbeing Centre for Research Innovation at the University of Queensland and a member of the Australian Research Council Centre of Excellence for the Digital Child. George has a PhD in behavioural sciences and his research has focused on better understanding digital technology use among children and how such engagement impacts on their health, wellbeing, and development. He has worked in public health and behavioural sciences for over 10 years, starting with a government taskforce on Weight Management, providing healthy lifestyle programs for school children and families. He has taught research methods and public health to undergraduate paramedic and sport and exercise science students and received excellent student ratings. He has supervised over 25 student research projects. George is a passionate advocate for the promotion of healthy behaviours and is committed to translating evidence into community settings.

Availability

Dr George Thomas is:
Available for supervision
Media expert

Qualifications

  • Bachelor (Honours) of Exercise and Sports Sciences, University of Gloucestershire
  • Masters (Research) of Health Sciences (Public Health), University of Bristol
  • Doctor of Philosophy of Behavioural Science, University of Southern Queensland

Research interests

  • Physical activity and health

  • Measurement of physical activity and sedentary behaviour

  • Screen use in children and adolescents

  • Pragmatic evaluation of health promotion interventions

Research impacts

George is an early career researcher and has published thirteen research papers (2018-present) indexed in Scopus, with 1549 citations. One paper has a Relative Citation Index (RCI) of 40 (Human Movement and Sports Science) and the highest cited article published since 2017 in Psychology of Sport and Exercise. He has presented at several national and international conferences and received the Best Oral Presentation at the International Society for Behavioural Nutrition and Physical Activity Congress in 2020. He has completed reviews for peer-reviewed journals in fields related to psychology and public health (e.g., Journal of Sport and Exercise Psychology). He has been an investigator on grants worth over $4M, including $300,000 additional project funding from the Australian Research Council Centre of Excellence for the Digital Child, and others from the School of Allied Health at Curtin University and Human Movement and Nutritional Sciences at the University of Queensland.

Works

Search Professor George Thomas’s works on UQ eSpace

25 works between 2018 and 2025

1 - 20 of 25 works

Featured

2020

Journal Article

A descriptive epidemiology of screen-based devices by children and adolescents: a scoping review of 130 surveillance studies since 2000

Thomas, George, Bennie, Jason A., De Cocker, Katrien, Castro, Oscar and Biddle, Stuart J. H. (2020). A descriptive epidemiology of screen-based devices by children and adolescents: a scoping review of 130 surveillance studies since 2000. Child Indicators Research, 13 (3), 935-950. doi: 10.1007/s12187-019-09663-1

A descriptive epidemiology of screen-based devices by children and adolescents: a scoping review of 130 surveillance studies since 2000

Featured

2019

Journal Article

Physical activity and mental health in children and adolescents: an updated review of reviews and an analysis of causality

Biddle, Stuart J. H., Ciaccioni, Simone, Thomas, George and Vergeer, Ineke (2019). Physical activity and mental health in children and adolescents: an updated review of reviews and an analysis of causality. Psychology of Sport and Exercise, 42, 146-155. doi: 10.1016/j.psychsport.2018.08.011

Physical activity and mental health in children and adolescents: an updated review of reviews and an analysis of causality

2025

Journal Article

Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage

Healy, Genevieve N., Melendez-Calderon, Alejandro, Kaab, Sami, Bongers, Noah, Heseltine, Katherine A., Yue, Chan Hi, Thomas, George and Clark, Bronwyn K. (2025). Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage. Applied Ergonomics, 126 104490, 104490. doi: 10.1016/j.apergo.2025.104490

Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage

2025

Journal Article

Unpacking the relationship between autism, sport participation, and adolescent health: a causal mediation analysis

O'Flaherty, Martin, Hill, Jessica, Bourke, Matthew, Fortnum, Kathryn, Thomas, George, Gomersall, Sjaan R. and Cairney, John (2025). Unpacking the relationship between autism, sport participation, and adolescent health: a causal mediation analysis. Disability and Health Journal 101832, 1-8. doi: 10.1016/j.dhjo.2025.101832

Unpacking the relationship between autism, sport participation, and adolescent health: a causal mediation analysis

2025

Journal Article

Association between 24-hour movement behaviors and adiposity in children and adolescents: A compositional data meta-analysis

Bourke, Matthew, Harrison, Zoe, Fortnum, Kathryn, Thomas, George, O'Flaherty, Martin, Mulcahy, Samantha K., Gomersall, Sjaan R., Alsop, Tahlia, Trost, Stewart G., Koplin, Jennifer J., Bruijns, Brianne A., Phillips, Sophie M., Vanderloo, Leigh M., Tucker, Patricia, Hesketh, Kylie D., Kwan, Matthew Y. W. and Cairney, John (2025). Association between 24-hour movement behaviors and adiposity in children and adolescents: A compositional data meta-analysis. Obesity Reviews, 26 (5) e13884, e13884. doi: 10.1111/obr.13884

Association between 24-hour movement behaviors and adiposity in children and adolescents: A compositional data meta-analysis

2024

Journal Article

Construct validity and reliability of the effective early childhood physical literacy pedagogue (ECE-PLP) self-report instrument

Barratt, Jaime, Dudley, Dean, Stylianou, Michalis, Thomas, George, Wheeler, Kai and Cairney, John (2024). Construct validity and reliability of the effective early childhood physical literacy pedagogue (ECE-PLP) self-report instrument. Measurement in Physical Education and Exercise Science, ahead-of-print (ahead-of-print), 1-15. doi: 10.1080/1091367x.2024.2422309

Construct validity and reliability of the effective early childhood physical literacy pedagogue (ECE-PLP) self-report instrument

2024

Journal Article

Evaluation of the ActiMotus software to accurately classify postures and movements in children aged 3–14

Lund Rasmussen, Charlotte, Hendry, Danica, Thomas, George, Beynon, Amber, Stearne, Sarah Michelle, Zabatiero, Juliana, Davey, Paul, Roslyng Larsen, Jon, Rohl, Andrew Lloyd, Straker, Leon and Campbell, Amity (2024). Evaluation of the ActiMotus software to accurately classify postures and movements in children aged 3–14. Sensors, 24 (20) 6705. doi: 10.3390/s24206705

Evaluation of the ActiMotus software to accurately classify postures and movements in children aged 3–14

2024

Journal Article

24-hour movement behaviors of LGBTQA+ young people: a systematic review

Fortnum, Kathryn, Gomersall, Sjaan R., Ross, Megan H., Woodforde, James, Thomas, George, Wen, Yu-Shu, Perales, Francisco and Stylianou, Michalis (2024). 24-hour movement behaviors of LGBTQA+ young people: a systematic review. Journal of Physical Activity & Health, 21 (12), 1-17. doi: 10.1123/jpah.2024-0343

24-hour movement behaviors of LGBTQA+ young people: a systematic review

2024

Journal Article

Device-based measurement of office-based physical activity and sedentary time: a systematic review

Bongers, Noah, Healy, Genevieve N., Thomas, George and Clark, Bronwyn K. (2024). Device-based measurement of office-based physical activity and sedentary time: a systematic review. Journal for the Measurement of Physical Behaviour, 7 (1), 10-22. doi: 10.1123/jmpb.2024-0011

Device-based measurement of office-based physical activity and sedentary time: a systematic review

2024

Journal Article

Early Childhood Screen Use Contexts and Cognitive and Psychosocial Outcomes : A Systematic Review and Meta-analysis

Mallawaarachchi, Sumudu, Burley, Jade, Mavilidi, Myrto, Howard, Steven J., Straker, Leon, Kervin, Lisa, Staton, Sally, Hayes, Nicole, Machell, Amanda, Torjinski, Marina, Brady, Brodie, Thomas, George, Horwood, Sharon, White, Sonia L. J., Zabatiero, Juliana, Rivera, Clara and Cliff, Dylan (2024). Early Childhood Screen Use Contexts and Cognitive and Psychosocial Outcomes : A Systematic Review and Meta-analysis. JAMA Pediatrics, 178 (10) e20162591, 1017-1026. doi: 10.1001/jamapediatrics.2024.2620

Early Childhood Screen Use Contexts and Cognitive and Psychosocial Outcomes : A Systematic Review and Meta-analysis

2024

Journal Article

Intense and problematic social media use and sleep difficulties of adolescents in 40 countries

Khan, Asaduzzaman, Thomas, George, Karatela, Shamshad, Morawska, Alina and Werner-Seidler, Aliza (2024). Intense and problematic social media use and sleep difficulties of adolescents in 40 countries. Journal of Adolescence, 96 (5), 1116-1125. doi: 10.1002/jad.12321

Intense and problematic social media use and sleep difficulties of adolescents in 40 countries

2024

Journal Article

Measurement method options to investigate digital screen technology use by children and adolescents: a narrative review

Beynon, Amber, Hendry, Danica, Lund Rasmussen, Charlotte, Rohl, Andrew L., Eynon, Rebecca, Thomas, George, Stearne, Sarah, Campbell, Amity, Harris, Courtenay, Zabatiero, Juliana and Straker, Leon (2024). Measurement method options to investigate digital screen technology use by children and adolescents: a narrative review. Children, 11 (7) 754. doi: 10.3390/children11070754

Measurement method options to investigate digital screen technology use by children and adolescents: a narrative review

2024

Journal Article

An umbrella review of the benefits and risks associated with youths’ interactions with electronic screens

Sanders, Taren, Noetel, Michael, Parker, Philip, Del Pozo Cruz, Borja, Biddle, Stuart, Ronto, Rimante, Hulteen, Ryan, Parker, Rhiannon, Thomas, George, De Cocker, Katrien, Salmon, Jo, Hesketh, Kylie, Weeks, Nicole, Arnott, Hugh, Devine, Emma, Vasconcellos, Roberta, Pagano, Rebecca, Sherson, Jamie, Conigrave, James and Lonsdale, Chris (2024). An umbrella review of the benefits and risks associated with youths’ interactions with electronic screens. Nature Human Behaviour, 8 (1), 82-99. doi: 10.1038/s41562-023-01712-8

An umbrella review of the benefits and risks associated with youths’ interactions with electronic screens

2022

Journal Article

Physical activity and sedentary behaviour of female adolescents in Indonesia: a multi-method study on duration, pattern and context

Andriyani, Fitria Dwi, Biddle, Stuart J. H., Priambadha, Aprida Agung, Thomas, George and De Cocker, Katrien (2022). Physical activity and sedentary behaviour of female adolescents in Indonesia: a multi-method study on duration, pattern and context. Journal of Exercise Science & Fitness, 20 (2), 128-139. doi: 10.1016/j.jesf.2022.02.002

Physical activity and sedentary behaviour of female adolescents in Indonesia: a multi-method study on duration, pattern and context

2022

Journal Article

Using wearable cameras to categorize the type and context of screen-based behaviors among adolescents: observational study

Thomas, George, Bennie, Jason A., De Cocker, Katrien, Dwi Andriyani, Fitria, Booker, Bridget and Biddle, Stuart J. H. (2022). Using wearable cameras to categorize the type and context of screen-based behaviors among adolescents: observational study. JMIR Pediatrics and Parenting, 5 (1) e28208, e28208. doi: 10.2196/28208

Using wearable cameras to categorize the type and context of screen-based behaviors among adolescents: observational study

2022

Other Outputs

Screen time. In Active Healthy Kids Australia (2022). Reboot! Reimagining Physically Active Lives: 2022 Australian Report Card on Physical Activity for Children and Young People

Zabatiero, Juliana, Thomas, George and Straker, Leon (2022). Screen time. In Active Healthy Kids Australia (2022). Reboot! Reimagining Physically Active Lives: 2022 Australian Report Card on Physical Activity for Children and Young People. Melbourne, Australia: Active Health Kids Australia.

Screen time. In Active Healthy Kids Australia (2022). Reboot! Reimagining Physically Active Lives: 2022 Australian Report Card on Physical Activity for Children and Young People

2020

Journal Article

Screen-based behaviors in Australian adolescents: longitudinal trends from a 4-year follow-up study

Thomas, George, Bennie, Jason A., De Cocker, Katrien, Ireland, Michael J. and Biddle, Stuart J. H. (2020). Screen-based behaviors in Australian adolescents: longitudinal trends from a 4-year follow-up study. Preventive Medicine, 141 106258. doi: 10.1016/j.ypmed.2020.106258

Screen-based behaviors in Australian adolescents: longitudinal trends from a 4-year follow-up study

2020

Journal Article

Exploring contemporary screen time in Australian adolescents: a qualitative study

Thomas, George, Bennie, Jason A., De Cocker, Katrien and Biddle, Stuart J.H. (2020). Exploring contemporary screen time in Australian adolescents: a qualitative study. Health Promotion Journal of Australia, 32 (S2), 238-247. doi: 10.1002/hpja.440

Exploring contemporary screen time in Australian adolescents: a qualitative study

2020

Conference Publication

Screen-based behaviors in Australian adolescents: longitudinal trends from 2010 to 2014

Thomas, G., Bennie, J., De Cocker, K., Sanders, T. and Biddle, S. J. H. (2020). Screen-based behaviors in Australian adolescents: longitudinal trends from 2010 to 2014. International Society for Behavioral Nutrition and Physical Activity, Online, 15-25 June 2020.

Screen-based behaviors in Australian adolescents: longitudinal trends from 2010 to 2014

2019

Conference Publication

Physical activity and self-esteem outcomes in young people: what can we conclude from research syntheses?

Biddle, S. J. H., Ciaccioni, S., Thomas, G. and Vergeer, I. (2019). Physical activity and self-esteem outcomes in young people: what can we conclude from research syntheses?. Australasian Society for Behavioural Health and Medicine , Christchurch, New Zealand, 15-17 February 2019.

Physical activity and self-esteem outcomes in young people: what can we conclude from research syntheses?

Funding

Past funding

  • 2023 - 2024
    Creativity in Motion: Fostering athletes' creative potential and adaptability
    Tennis Australia
    Open grant

Supervision

Availability

Dr George Thomas is:
Available for supervision

Before you email them, read our advice on how to contact a supervisor.

Available projects

  • Health and Wellbeing Centre for Research Innovation

    We currently have opportunities available for multiple higher degree research (HDR) students to join the Health and Wellbeing Centre for Research Innovation (HWCRI). In 2022, UQ received foundation funding from Health and Wellbeing Queensland (HWQld) to co-fund the creation of the Health and Wellbeing Centre for Research Innovation (HWCRI). In partnership with HWQld, HWCRI provides clinical and research expertise in in the fields of physical activity and nutrition with a population and preventative health focus, to inform HWQld’s program design, delivery and evaluation. HWCRI conducts innovative and novel high impact transdisciplinary research in community health and wellbeing across the lifecourse, to reduce health inequities and improve the health and wellbeing of all Queenslanders. The UQ HWCRI aims to translate research and evaluation findings into concepts and products for population level, state-wide implementation; and to build and sustain capacity in health promotion expertise by providing ‘real world’ training opportunities for undergraduate, post-graduate and higher degree research (HDR) students and fellows.

    Successful applicants will be part of the School of Human Movement and Nutrition Sciences which is consistently ranked in the world’s Top 5 and is highly regarded nationally and internationally for its teaching, research and community outreach programs. The 2021 QS World Rankings by subject area ranked UQ first in Australia and second in the world in sports-related subjects. They will also be supported and conduct research in partnership with Health and Wellbeing Queensland (HWQld) which is a Queensland Government prevention agency aimed at improving population health and reducing health inequities by reducing the burden of chronic disease across the state. The health and wellbeing of the next generation of Queensland children is a key focus for HWQld and offers a once in a life-time opportunity to change the lives of the next generation where every Queenslander can live their best life, regardless of where they live.

    This opportunity would suit students with a background in allied health, health promotion, public health, health psychology, implementation science, or human movement studies. Excellent communication and interpersonal skills are essential. Experience working with industry stakeholders and knowledge of qualitative and quantitative research methods and behaviour change would be of benefit. First Nations applicants are particularly encouraged to apply. This is a unique opportunity to be at the forefront of this exciting new research centre and engage with industry partners and government and specific programs of research can be tailored based on the applicant’s interest and previous experience and expertise.

Media

Enquiries

Contact Dr George Thomas directly for media enquiries about:

  • Adolescents
  • Children
  • Physical activity
  • Screen use
  • Sedentary behaviour

Need help?

For help with finding experts, story ideas and media enquiries, contact our Media team:

communications@uq.edu.au