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Please use this identifier to cite or link to this item: http://hdl.handle.net/1820/6720
Title: Effects of motivational interviewing and self-determination theory in a web-based computer tailored physical activity intervention: a randomized controlled trial
Authors: Friederichs, Stijn
Keywords: physical activity
motivational interviewing
self-determination theory
web-based
computer tailoring
Issue Date: 2015
Publisher: Open Universiteit Nederland
Abstract: Web-based computer tailored physical activity (PA) interventions are a promising approach to promote PA. This study aims to explore whether a web-based computer tailored physical activity intervention grounded in self-determination theory and motivational interviewing is more effective and better appreciated than web-based physical activity intervention based on traditional health behavior theories. Furthermore, this study aims to identify participant characteristics that modify the intervention effects. A randomized controlled trial was conducted, with three research conditions: 1) the I Move condition; participants in this condition receive the I Move intervention, which is a web-based computer tailored physical activity intervention based on motivational interviewing and self-determination theory, 2) the Active Plus condition; participants in this condition receive the Active plus intervention, which is a web-based computer tailored physical activity intervention, based on traditional health behavioral theories and 3) the control condition, which is a waiting list control group. Effect and process outcomes were measured by self-report, using web-based questionnaires. Physical activity measures (weekly minutes of moderate to vigorous physical activity and weekly days with minimal 30 minutes of physical activity) were assessed at baseline and at 3 and 6 months from baseline. Process evaluation measures were assessed at 6 weeks and at 3 months from baseline. Data of 3089 participants (30,9% male, mean age 45 +/- 13) were analyzed. Effect evaluation was conducted using multilevel linear regression analyses. Process evaluation was conducted using analyses of variance.
URI: http://hdl.handle.net/1820/6720
Appears in Collections:MSc Psychology

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