A novel computer tool (peas@tees), designed to assess habitual physical activity levels in children aged 9 and 10 years, was evaluated. Study 1 investigated agreement between peas@tees and accelerometry in 157 children. Bland-Altman limits of agreement (LOA) revealed peas@tees underestimated physical activity levels compared with accelerometry (bias −21 min; 95% LOA -146–105). Study 2 investigated stability of peas@tees in a separate sample of 42 children. Intraclass correlation coefficient was 0.75 (95% CI 0.62–0.84). Computer tools are promising as a cheap, feasible, and useful method to monitor children’s habitual levels of physical activity at the group level.
McLure is with the School of Health and Social Care, University of Teesside, Middlesbrough, TS1 3BA UK. Reilly is with the University Division of Developmental Medicine, Yorkhill Hospitals, Glasgow, Scotland, G3 8SJ, UK. Crooks is with the School of Computing, University of Teesside, Middlesbrough, TS1 3BA, UK. Summerbell is with the School of Medicine and Health, Durham University, Queen’s Campus, Stockton-on-Tees, TS17 6BH, UK.