dc.contributor.author | Dawes, Helen | |
dc.date.accessioned | 2022-03-28T21:26:28Z | |
dc.date.available | 2022-03-28T21:26:28Z | |
dc.date.issued | 2022-02 | |
dc.identifier.citation | Catherine Wheatley, Thomas M. Wassenaar, Nick Beale, Piergiorgio Salvan, Helen Dawes, Emma Davies and Heidi Johansen-Berg.The importance of prototype similarity for physical activity: Cross-sectional and longitudinal associations in a large sample of young adolescents.British Journal of Health Psychology (2022) | en |
dc.identifier.uri | https://oxfordhealth-nhs.archive.knowledgearc.net/handle/123456789/1033 | |
dc.description | Open Access | en |
dc.description.abstract | Objectives. Physical activity declines during adolescence. The Theory of Planned
Behaviour (TPB) is a useful framework for investigating activity but leaves variance
unexplained. We explored the utility of a dual-process approach using the TPB and the
Prototype Willingness Model (PWM) to investigate correlates of physical activity, and 1-
year change in physical activity, among a large sample of adolescents.
Design. A cross-sectional and longitudinal analysis of baseline and follow-up data from
the Fit to Study cluster-randomized trial.
Methods. A total of 9,699 secondary school pupils at baseline and 4,632 at follow-up
(mean age = 12.5 years) completed measures of past week physical activity and
constructs from both behaviour-change models, at time-points 1 year apart. Crosssectional analyses used multilevel, stepwise regression models to measure the strength of
associations between model constructs and physical activity, and variance in behaviour
explained by PWM over and above TPB. In longitudinal analyses, change scores were
calculated by subtracting follow-up from baseline scores. Models controlling for trial
treatment status measured the strength of associations between change scores, and
variance explained.
Results. At baseline, after controlling for past behaviour, physically active prototype
similarity had the strongest relationship with activity after the intention to be active.
Change in prototype similarity had the strongest relationship with change in activity after
the change in intention and attitudes. Prototype perceptions and willingness explained
additional variance in behaviour.
Conclusion. A dual-process model incorporating prototype perceptions could more
usefully predict physical activity than models based on rational expectations alone.
Behaviour-change interventions promoting an active self-image could be tested for effects
on physical activity | en |
dc.description.sponsorship | Supported by the NIHR | en |
dc.description.uri | https://DOI:10.1111/bjhp.12582 | en |
dc.language.iso | en | en |
dc.subject | Physical Activity | en |
dc.subject | Children and Adolescents | en |
dc.title | The importance of prototype similarity for physical activity: Cross-sectional and longitudinal associations in a large sample of young adolescents | en |
dc.type | Article | en |