Evaluating the Effectiveness of Mobile Self-guided Psychological Interventions to Reduce Relapse in Substance Use Disorder

The aim of the study is to evaluate the effectiveness of mobile interventions in reducing craving and lapses in patients diagnosed with Substance Use Disorder. Participants will be recruited from clinical patients receiving either in-patient or out-patient treatments for Substance Use Disorder (SUD) and enrolled in one of three groups: 1) Patients with alcohol addiction, 2) Patients with cross-addiction (alcohol and stimulants), 3) Patients with cannabis addiction. Participants will be randomly assigned to either intervention or control condition. The mobile interventions will be delivered via a mobile app Nałogometr 2.0, freely available. Participants in the intervention condition will have free access to all of the app functionalities, while the control group won't gain access to the interventions until after study completion. Interventions consist of audio-guided, short sessions on gratitude, thoughts management, motivation, relaxation, audio-guided mindfulness sessions concentrated on raising awareness of emotions and body signals or coping with stress, as well as CBT-based written sessions grounded in thought management and journaling techniques. With the use of ecological momentary assessment (EMA), longitudinal data on several variables related to craving and lapse risk will be collected. Additionally, a questionnaire battery assessment - administered at baseline, after one month, after two months, and after three months - will measure severity of substance dependence, levels of anxiety, depression, and life satisfaction.