App-Based Intervention Combining Evidence-Based Behavior Change Techniques With a Model-Based Reasoning System to Promote Physical Activity Among Young Adults (Active2Gether): Descriptive Study of the Development and Content
App-Based Intervention Combining Evidence-Based Behavior Change Techniques With a Model-Based Reasoning System to Promote Physical Activity Among Young Adults (Active2Gether): Descriptive Study of the Development and Content
Anouk Middelweerd
1
, MSc ;
Saskia J te Velde
1, 2
, PhD ;
Julia S Mollee
3
, PhD ;
Michel CA Klein
3
, PhD ;
Johannes Brug
1, 4
, PhD
1
VU Medical Center Amsterdam, Department of Epidemiology & Biostatistics, Amsterdam, Netherlands
2
te Velde Research & Consultancy, Bunnik, Netherlands
3
VU University Amsterdam, Department of Computer Science, Amsterdam, Netherlands
4
University of Amsterdam, Faculty of Social and Behavioural Sciences, Amsterdam, Netherlands