Digital Mental Health Service for Non-Treatment Seeking Young Adults

This is a feasibility trial of a personalized 8-week text messaging intervention aimed at young adults (ages 18-25) with depression and anxiety who are not interested in -- or experience barriers to -- receiving traditional face-to-face psychological treatments. The trial will consist of a pilot test of (1) an 8-week adaptive (personalized) messaging intervention relative to (2) a non-personalized digital mental health intervention, or (3) an active control which will send weekly psychoeducation information by way of Uniform Resource Locators (URLs). The adaptive intervention will uses machine learning to tailor Short Message Service (SMS) messages to an individual's needs and preferences, and URL links to provide access to psychoeducational content to contextualize messages, when the length of that content exceeds the limitations of messages. The primary goals of the project are to conduct a feasibility trial using a sequential multiple assignment randomized treatment (SMART) design, which will evaluate (a) the effectiveness of an adaptive, personalized messaging intervention in reducing engagement relative to a non-personalized version; and (b) whether human coaching results in greater symptom reduction and engagement, relative an unguided implementation.