Construct [References for measurement] | Description | Included in: | ||||
---|---|---|---|---|---|---|
T1 | T2 | T3 | T4 | Diary | ||
The outcome variable, additional assessment | ||||||
Duration in minutes (together with the friend), intensity | X | X | X | X | X | |
Mediator and control variables | ||||||
Perceived vulnerability for one’s own health | X |  | X | X | X | |
Expected positive and negative consequences of both acting and not acting | X | Â | X | X | X | |
Self-efficacy (individual and collaborative) [53, 64, 66, 67] | Feeling of competency regarding a person’s ability to overcome barriers regarding PA | X |  | X | X | X |
Intended action of PA | X | Â | X | X | X | |
Action and coping planning (individual and collaborative) [53, 64, 66] | Action planning pertains to the when, where, and how of intended action; coping planning is the anticipation of barriers and the design of alternative actions | X |  | X | X | X |
Action control includes three subfacets: awareness of intentions, self-monitoring and regulatory effort | X | Â | X | X | X | |
Emotional and practical received social support regarding PA | Â | X | X | X | X | |
Emotional and practical provided social support regarding PA | Â | X | X | X | X | |
Activation of social support from the friend | Â | X | X | X | X | |
Characteristics of received peer social support [53, 64, 67] | Perceived quality, responsiveness, and satisfaction with social support | Â | X | X | X | X |
Received peer social control [68] | Received social control from the friend regarding PA | Â | X | X | X | X |