‘Things You Do’: a randomized controlled trial of a minimal psychological intervention in people seeking mental health services

All participants will receive the 'Things You Do' Intervention PLUS Text Message Reminders. The intervention is 4-weeks in duration and is self-guided (i.e., no scheduled contact with a clinician). The trial is held at the eCentreClinic, and will be delivered individually. Participants will receive: 1. Access to a brief lesson which outlines the 'things you do', the link between activity levels and mental health, and encourages people to increase their 'things you do'. 2. A text message reminding them to engage in an activity listed on the questionnaire. Each text message will be different, and 20 messages will be sent across the entire intervention (i.e., once per day, Monday to Friday, for four weeks). The questionnaire has been previously used in two large surveys (n = 3789, n = 3048). The 21-items are taken from a larger 96-item questionnaire set. The 21-items were the most strongly associated with anxiety and depression scores. This data is currently being prepared for publication. The questionnaire takes approximately 5-10 minutes to complete. Participants will not be instructed to spend a set amount of time completing the activities. Instead, it is recommended that the activities are completed three to four times per week (i.e., more than half the days). The time taken to complete the activities is at the participants' discretion. The only strategy used to monitor adherence will be whether the participant accesses the lesson or downloads the lesson from the website.