Overview
Background
Dr George Thomas is a Research Fellow in the School of Human Movement and Nutrition Sciences at The University of Queensland and a member of the ARC Centre of Excellence for the Digital Child. His research focuses on children’s digital technology use, family digital routines, healthy screen use, and child health and wellbeing.
George leads an integrated program of research focused on understanding and improving how families manage children’s screen use. His work spans digital health, behavioural science, public health, and research translation through partnerships with government and industry.
His research has informed international policy and guidelines, including reports from UNESCO and the World Health Organization, and contributes to global initiatives such as the Active Healthy Kids Global Alliance.
George is also committed to education and mentorship, having supervised more than 40 student research projects across psychology, dietetics, and exercise science, and supporting students to work on real-world policy and community initiatives.
Availability
- Dr George Thomas is:
- Available for supervision
- Media expert
Fields of research
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
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Physical activity and health
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Measurement of physical activity and sedentary behaviour
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Screen use in children and adolescents
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Pragmatic evaluation of health promotion interventions
Research impacts
Dr Thomas's research is helping shape healthier digital habits, improve child wellbeing, and support families, schools, and communities to navigate the challenges of growing up in a digital world.
Key impacts include:
Informing policy and global guidelines
George’s research has informed more than 40 policy documents from international and national organisations, including UNESCO and the World Health Organization, contributing to global discussions on children’s digital wellbeing and health.
Improving how children’s screen use is measured and understood
His research has helped shift the field beyond simple “screen time” measures toward understanding family digital routines, influencing how researchers, governments, and organisations approach children’s digital behaviour and health.
High research influence and uptake
With more than 30 publications, over 1,300 citations, and a Field-Weighted Citation Impact of 5.16 (cited 416% more than the global average), George’s research is widely used by researchers, policymakers, and organisations worldwide. His work has been cited across more than 100 countries and multiple disciplines including medicine, psychology, engineering, and social sciences.
Translation into real-world programs and workforce development
George works closely with Health and Wellbeing Queensland to translate research into practice, including contributing to preventive health training programs reaching more than 4,500 Child and Family Health staff across Queensland who support families with young children.
Leadership of funded research addressing real-world problems
He has secured more than $2.5 million in competitive research funding and leads projects focused on improving children’s digital wellbeing, family health behaviours, and community health programs.
Works
Search Professor George Thomas’s works on UQ eSpace
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
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
2026
Journal Article
Parental knowledge, attitudes, and perceived usefulness of Australian screen time guidelines for toddlers and preschoolers
Thomas, George, Lau, Samara, Gomersall, Sjaan, Stylianou, Michalis, Bourke, Matthew, Duncombe, Stephanie L., Vergeer, Ineke, Morawska, Alina, Trost, Stewart, Cairney, John and Biddle, Stuart (2026). Parental knowledge, attitudes, and perceived usefulness of Australian screen time guidelines for toddlers and preschoolers. Health Promotion Journal of Australia, 37 (2) e70178, 1-11. doi: 10.1002/hpja.70178
2026
Journal Article
Developmental coordination disorder traits persistently affect physical activity and sedentary behavior in adults
Cavalcante-Neto, Jorge Lopes, Silva, Joao Mateus Carneiro, Thomas, George, da Silva, Sarah Moreira, da Silva, Irla Pereira and Cairney, John (2026). Developmental coordination disorder traits persistently affect physical activity and sedentary behavior in adults. Scientific Reports, 16 (1) 10896, 1-13. doi: 10.1038/s41598-026-42487-y
2026
Journal Article
Association between healthy lifestyle behaviors and mental health symptoms in children with autism and ADHD: a latent profile analysis
Bourke, Matthew, Walker, Jacqueline L., Thomas, George, Fortnum, Kathryn and O'Flaherty, Martin (2026). Association between healthy lifestyle behaviors and mental health symptoms in children with autism and ADHD: a latent profile analysis. Autism Research e70238, e70238. doi: 10.1002/aur.70238
2026
Journal Article
Within-person association between daily screen use and sleep in youth
Bourke, Matthew, Maddren, Claudia I., Sippel, Franziska and Thomas, George (2026). Within-person association between daily screen use and sleep in youth. JAMA Pediatrics. doi: 10.1001/jamapediatrics.2025.6490
2026
Journal Article
Healthy technology use in schools: implications for screen time, social media, and smartphone use
Thomas, George and Campbell, Marilyn (2026). Healthy technology use in schools: implications for screen time, social media, and smartphone use. Journal of Psychologists and Counsellors in Schools, 36 (1), 3-6. doi: 10.1177/20556365261426201
2026
Journal Article
The digital home in early childhood: classifications of digital landscapes among young Australian children
Thomas, George, Bourke, Matthew, Duncombe, Stephanie L., Pattinson, Cassandra L., Vergeer, Ineke, Biddle, Stuart J.H., Gomersall, Sjaan and Stylianou, Michalis (2026). The digital home in early childhood: classifications of digital landscapes among young Australian children. Journal of Psychologists and Counsellors in Schools, 36 (1) 20556365261422013, 38-51. doi: 10.1177/20556365261422013
2026
Journal Article
Examining health behaviour profiles among children with autism and ADHD using latent profile analysis
Bourke, Matthew, O'Flaherty, Martin, Fortnum, Kathryn, Thomas, George and Walker, Jacqueline L. (2026). Examining health behaviour profiles among children with autism and ADHD using latent profile analysis. Research in Autism, 130 202751, 202751. doi: 10.1016/j.reia.2025.202751
2026
Journal Article
Send in the squad—Podsquad! Using design thinking as a framework to develop a public health promotion programme
Farletti, Rebecca, Walker, Jacqueline L., Chai, Li Kheng, Campbell, Miranda, Munro, Joanna, Thomas, George, Cairney, John and Littlewood, Robyn (2026). Send in the squad—Podsquad! Using design thinking as a framework to develop a public health promotion programme. Health Promotion Journal of Australia, 37 (1) e70136, 1-11. doi: 10.1002/hpja.70136
2026
Book Chapter
Screens, health and sedentary lifestyles: the need to recognise complexity, function and context
Biddle, Stuart J.H., Andriyani, Fitria Dwi and Thomas, George (2026). Screens, health and sedentary lifestyles: the need to recognise complexity, function and context. Routledge handbook of digital technologies in sport, exercise and physical education. (pp. 36-51) edited by Victoria A. Goodyear and Andrea Bundon. Abingdon, Oxon, United Kingdom: Routledge. doi: 10.4324/9781003411758-4
2025
Journal Article
An analysis of people with disabilities in Australia by age, sex, disability type and severity – Implications for leveraging the 2032 Paralympic games to increase physical activity participation
Tweedy, Sean, Fortnum, Kathryn, Thomas, George, Cole, Damien, Demetriou, Bridget, Dutia, Iain, Hill, Jessica, Cairney, John and Beckman, Emma (2025). An analysis of people with disabilities in Australia by age, sex, disability type and severity – Implications for leveraging the 2032 Paralympic games to increase physical activity participation. JSAMS Plus, 6 100110, 1-9. doi: 10.1016/j.jsampl.2025.100110
2025
Conference Publication
Physical activity environments and behaviours in Outside School Hours Care
Stylianou, Michalis, Woodforde, James, Duncombe, Stephanie, Thomas, George, Lee, Jessica, Hill, Jessica and Gomersall, Sjaan (2025). Physical activity environments and behaviours in Outside School Hours Care. Asia-Pacific Society for Physical Activity, Newcastle, NSW Australia, 25-27 November 2025.
2025
Conference Publication
AI-assisted screening in large-scale reviews: a case example from a bibliometric study on physical activity technologies
Thomas, George, Gilson, Nick, Alley, Stephanie, Browne, Meighan, Duncan, Mitch and Vandelanotte, Corneel (2025). AI-assisted screening in large-scale reviews: a case example from a bibliometric study on physical activity technologies. Asia-Pacific Society for Physical Activity, Newcastle, NSW, Australia, 25-27 November 2025.
2025
Conference Publication
Technology for physical activity promotion: A bibliometric analysis over four decades using an AI-human hybrid search and selection model
Gilson, Nick, Thomas, George, Alley, Stephanie, Browne, Meighan, Duncan, Mitch and Vandelanotte, Corneel (2025). Technology for physical activity promotion: A bibliometric analysis over four decades using an AI-human hybrid search and selection model. Asia-Pacific Society for Physical Activity, Newcastle, NSW, Australia, 25-27 November 2025.
2025
Journal Article
The role of lifestyle factors in type 2 diabetes in children and adolescents: a systematic review
Fortnum, Kathryn, Thomas, George, Too, Kiara, Tam, Athena, Tilley, Kate, Cairney, John, Healy, Genevieve N. and Gomersall, Sjaan (2025). The role of lifestyle factors in type 2 diabetes in children and adolescents: a systematic review. BMC Public Health, 25 (1) 3675, 1-11. doi: 10.1186/s12889-025-23767-0
2025
Journal Article
Longitudinal associations between maternal and child screen use at 1 year of age and child behavior and development at 3 years of age
Sim, Stephanie, Zabatiero, Juliana, Bear, Natasha, Beynon, Amber, Thomas, George, Srinivasjois, Ravisha, Jongeling, Brad, Silva, Desiree and Straker, Leon (2025). Longitudinal associations between maternal and child screen use at 1 year of age and child behavior and development at 3 years of age. BMC Pediatrics, 25 (1) 791, 1-14. doi: 10.1186/s12887-025-05701-w
2025
Journal Article
Associations between screen time, sleep quality, diet quality and food selectivity among school-aged autistic children
Wang, Hiu Fei Wendy, Smith, Simon S., O’Flaherty, Martin, Trost, Stewart G., Thomas, George, Walker, Jacqueline L., Fortnum, Kathryn, McNaughton, Sarah, Cairney, John and Bourke, Matthew (2025). Associations between screen time, sleep quality, diet quality and food selectivity among school-aged autistic children. Journal of Autism and Developmental Disorders, 1-14. doi: 10.1007/s10803-025-07064-8
2025
Other Outputs
Questionnaires used to explore the perspectives of parents and health professionals on young children’s use of technology: a systematic review (Preprint)
Lund Rasmussen, Charlotte, Pui Hung Au, Ivan, Hendry, Danica, Beynon, Amber, Stearne, Sarah, Thomas, George, Mannell, Kate, Kervin, Lisa, Edwards, Susan, Harris, Courtenay, Straker, Leon and Zabatiero, Juliana (2025). Questionnaires used to explore the perspectives of parents and health professionals on young children’s use of technology: a systematic review (Preprint). doi: 10.2196/84712
2025
Journal Article
Correlates of physical activity among 4,719 Indonesian adolescents: the role of sociodemographic, screen time, and sports participation
Andriyani, Fitria Dwi, Hastuti, Tri Ani, Ries, Francis, Sari, Indah Prasetyawati Tri Purnama, Andrianto, Sigit Dwi, Thomas, George and Biddle, Stuart J. H. (2025). Correlates of physical activity among 4,719 Indonesian adolescents: the role of sociodemographic, screen time, and sports participation. International Journal of Human Movement and Sports Sciences, 13 (4), 942-953. doi: 10.13189/saj.2025.130430
Supervision
Availability
- Dr George Thomas is:
- Available for supervision
Looking for a supervisor? Read our advice on how to choose a supervisor.
Available projects
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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.
Supervision history
Current supervision
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Master Philosophy
Time cost and fatigue associated with sports participation for athletes with and without severe to profound disability and high support needs, a comparative analysis
Associate Advisor
Other advisors: Professor Sean Tweedy, Associate Professor Sjaan Gomersall
Media
Enquiries
Contact Dr George Thomas directly for media enquiries about:
- Adolescents
- Children
- Physical activity
- Screen use
- Sedentary behaviour
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