- Title
- Mediators of change in screen-time in a school-based intervention for adolescent boys: findings from the ATLAS cluster randomized controlled trial
- Creator
- Smith, Jordan J.; Morgan, Philip J.; Lonsdale, Chris; Dally, Kerry; Plotnikoff, Ronald C.; Lubans, David R.
- Relation
- Funding BodyARCGrant NumberDP120100611 http://purl.org/au-research/grants/arc/DP120100611
- Relation
- Journal of Behavioral Medicine Vol. 40, Issue 3, p. 423-433
- Publisher Link
- http://dx.doi.org/10.1007/s10865-016-9810-2
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2017
- Description
- The mechanisms of behavior change in youth screen-time interventions are poorly understood. Participants were 361 adolescent boys (12-14 years) participating in the ATLAS obesity prevention trial, evaluated in 14 schools in low-income areas of New South Wales, Australia. Recreational screen-time was assessed at baseline, 8- and 18-months, whereas potential mediators (i.e., motivation to limit screen-time and parental rules) were assessed at baseline, 4- and 18-months. Multi-level mediation analyses followed the intention-to-treat principle and were conducted using a product-of-coefficients test. The intervention had a significant impact on screen-time at both time-points, and on autonomous motivation at 18-months. Changes in autonomous motivation partially mediated the effect on screen-time at 18-months in single and multi-mediator models [AB (95% CI) = -5.49 (-12.13, -.70)]. Enhancing autonomous motivation may be effective for limiting screen-time among adolescent males. Trial registration: Australian New Zealand Clinical Trials Registry No: ACTRN12612000978864.
- Subject
- self-determination theory; sedentary behavior; rules; physical activity; obesity prevention
- Identifier
- http://hdl.handle.net/1959.13/1393007
- Identifier
- uon:33483
- Identifier
- ISSN:0160-7715
- Rights
- This is a post-peer-review, pre-copyedit version of an article published in the Journal of Behavioral Medicine. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10865-016-9810-2.
- Language
- eng
- Full Text
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