A Pilot Randomised Controlled Trial of the Peer Tree Digital Intervention Targeting Loneliness Iin Young People: A Study Protocol

Background: Young people are vulnerable to experiencing problematic levels of loneliness which can lead to poor mental health outcomes. Loneliness is a malleable treatment target and preliminary evidence has shown that it can be addressed with digital platforms. Peer Tree is a strengths-based digital smartphone application aimed at reducing loneliness. The study aim is to reduce loneliness, and assess the acceptability, usability, and feasibility of Peer Tree in young people enrolled at university. Methods: This will be a pilot randomised controlled trial (RCT) comparing a strengths-based digital smartphone application (Peer Tree) with a treatment as usual (TAU) condition. Forty-two young people enrolled at university will be recruited for this pilot RCT. Participants with suicidality risk, acute psychiatric symptoms in the past month, or a current diagnosis of a mood or social anxiety disorder will be excluded. Allocation will be made on a 1:1 ratio and will occur after the initial baseline assessment. Assessments are completed at baseline, post-intervention, and at follow-up. Participants in the TAU condition complete the same three assessment sessions. The primary outcomes of the study will be self-reported loneliness as well as the acceptability, usability, feasibility and safety of Peer Tree. Depression, social anxiety, and quality of life variables will also be measured as secondary outcomes. Discussion: This trial will report the findings of implementing Peer Tree, a smartphone application aimed at reducing loneliness in university students. Findings from this trial will highlight the initial efficacy, acceptability and feasibility of using digital positive psychology interventions to reduce subthreshold mental health concerns. Findings from this trial will also describe the safety of Peer Tree as a digital tool. Results will contribute evidence for positive psychology interventions to address mental ill-health.Trial registration: Australian New Zealand Clinical Trial Registry, ACTRN12619000350123. Registered 6th March 2020