An Exploratory Randomised Control Trial of a Single Session Intervention Combined With In-situ Socially Assistive Robot to Promote Emotion Regulation Competence in University Students

Need among college students for accessible mental health support is high: for example, the WHO World Mental Health International College Student project,(Auerbach et al., 2018) involving 13,984 first-year college students from eight countries, found that 31% of the respondents screened positive for depression, anxiety, or alcohol use disorder. Yet, access to professional support has long remained low, with waitlists for counseling on many campuses being weeks to months long (cf., for example Brown 2018). Digital technologies, including apps, have been proposed as one possible means of 'filling in the gaps' in extant mental health care support for college students - but most apps suffer from low usability in real-world settings (Torous et al, 2018), are not equipped to serve in-the-moment coping needs (e.g., they involve user-initiated psychoeducation modules rather than opportunities to practice and grow skills when they are needed most) and often show high drop-out rates (Musiat et al, 2014).

There thus is a clear need to harness digital technologies to create usable, engaging, evidence-supported mental health supports that may be used flexibly based on when students need them most (e.g. when stress levels are particularly high and coping skills most warrant deployment); ideally also as an adjunct completing existing counselling service.

In the pilot work last year (n=80, open trial at Oxford) the investigators evaluated one such possible tool-Purrble-designed to provide a student-centred, in-the-moment emotion regulation support. Study goals centred on testing usability/usage patterns during 8-week in-situ deployment, perceived usefulness over the same period, and links between use and symptoms in high-anxiety university students (GAD-7 > 10 at sign-up). The results have been promising, with large effects sizes on GAD7 scores over the period of the term (d~0.9), the majority of students perceived the Purrble intervention as useful with 61% reporting in the last survey that it helped their mental health, and detailed a range of positive outcomes in qualitative interviews (e.g., it helped them calm down and ground themselves in the present moment when they are feeling anxious, stressed or lonely, or be more gentle and kind with themselves -rather than harsh and judgmental- when feeling overwhelmed).

However, the open trial pilot study did not include a control or waitlisted group and thus more rigorous investigation of these promising effects is needed - leading to the current study.