DescriptionObjective: Computer tailoring (CT) modifies an intervention to the specific personal characteristics, needs and preferences of the individual user. However, the way CT is applied and theoretically embedded varies substantially, possibly resulting in different effects or different behavioral change processes.Methods: Two CT interventions targeted at increasing physicalactivity (PA) will be presented. The ActivePlus intervention, targeting older adults, is based on theories such as Social CognitiveTheory, Theory of Planned Behavior and Self-Regulation Theory. In a RCT we compared the effects and behavioral change processes on PA of four versions of the intervention: an online web-based versus a print-based version and for both versions we tested the added value of supplementary environmental PA information. Further, we tested the I Move intervention, a web-based CT intervention aimed at increasing PA in adults, which is basedon the Self Determination Theory, Self-Regulation Theory, and integrates Motivational Interviewing techniques in online CT. In a RCT we compared I Move to the more traditional online ActivePlus CT intervention, to test differences in PA effects and behavioral change processes of the more client centered I Move approach.
Results: All versions of the ActivePlus intervention were highly effective six months after baseline compared to a control group, while the print-based intervention remained effective up to oneyear after baseline. At six months, the I Move intervention proved effective in increasing PA compared to a control group. The differences in effects, as well in the behavioral change processes of both CT interventions, will be presented.
Conclusions: CT is potentially effective in increasing PA. However, different approaches can lead to substantially differences in effects as well as in behavioral change processes.
|Period||3 Jun 2015 → 6 Jun 2015|
|Event title||International Society of Behavioral Nutrition and Physical Activity Annual Meeting 2015: Advancing Behavior Change Science|
|Location||Edinburgh, United KingdomShow on map|
|Degree of Recognition||International|