Recruitment and strategies to improve adherence to interventions, promote participant retention, and complete follow-up {15, 11c, 18b}
Adequate participant enrolment to reach the target sample size will be guaranteed by Prolific Acedemic (ProA). ProA has a sufficiently large database of registered prospective trial participants.The major strategy to improve adherence to the interventions in this trial is to offer payment to all participants. The payments will be given only after completing the whole survey (i.e., once the medium-term follow-up questionnaire is finished). If participants spend more than 45 min on any phase of the trial, they will be timed out of the experiment. This prevents participants from burdening the system with partially completed questionnaires. Throughout the study, investigators will have no access to the identity of the participants, so follow-up with individual participants is not possible. All incomplete datasets from participants who discontinue or deviate from intervention protocols will be descriptively reported.