Evaluation of the Efficacy of Two Internet-based Self-help Interventions for Loneliness.

A Randomized Controlled Trial to Evaluate the Efficacy of Two Internet-based Self-help Interventions for Loneliness.

In this study, people who suffer from loneliness will be randomized to three study conditions. The first and second group get an account to an internet-based self-help intervention. The first group also receives weekly feedback from a coach and the second group receives an automated email on a weekly basis. The third group is a waiting control group. In all three conditions additional care or treatment is allowed. The aim of the study is to investigate the efficacy of an internet-based self-help intervention to reduce feelings of loneliness compared to a waiting list and the effect of support during the intervention. Assessments are at baseline, 5-week, 10-week, 6-months and 12-months post-randomization. Participants in the waiting control group get also access to the intervention and fill out questionnaires at baseline, 5-week and 10-week post-randomization and get also access to the intervention 10 weeks after randomization.

Inclusion Criteria:

• Sumscore ≥ 18 on the UCLA Loneliness Scale
• Signed Informed Consent
• Contact information provided in case of emergency
• Internet connection and device to use it (Smartphone, Computer, Tablet)
• Fluent in german language

Exclusion Criteria:

• Acute suicidality
• A current diagnose of substance dependence, a current or previous diagnose of psychotic disorder or bipolar disorder
• A current diagnosis of severe depression (PHQ-9 > 14)