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A Socially Assistive Robot for Outpatient Eating Disorder Waiting‐List Support: A Mixed‐Methods Feasibility Randomised Controlled Trial

Year: 2026

Type: article

Study designs: Randomized Controlled Trial, Clinical Trial

Abstract: OBJECTIVE: This feasibility randomised controlled trial (RCT) evaluated Purrble, a socially assistive robot for emotion regulation, as a low-intensity adjunct during waitlist periods in adult eating disorder services. METHOD: Adults waiting for outpatient eating disorder treatment were randomised to four weeks of Purrble use or waitlist-as-usual. The primary outcome was emotion regulation, assessed with the Difficulties in Emotion Regulation Scale; secondary outcomes included sensory sensitivity, anxiety, depression, and motivation for change. Analyses were conducted using paired t-tests and linear mixed-effects models. Acceptability was explored via a qualitative survey. RESULTS: 39 participants were enrolled in the trial and 37 participants were retained (19 Purrble, 18 control). A significant group × time interaction emerged for depression, with greater reductions in symptoms among Purrble participants. No significant interactions were found for emotion regulation, sensory sensitivity, motivation, or anxiety, though the Purrble group showed small-to-moderate improvements in emotion regulation, sensory sensitivity, and anxiety, and a significant within-group increase in motivation. Qualitative findings identified four categories: situational use during distress, sensory comfort and emotional connection, design limitations/barriers, and continued use with integration into self-care. CONCLUSIONS: Purrble proved acceptable and feasible as a waitlist adjunct in adult eating disorder outpatient services. A significant between-group effect on depression and a within-group improvement in motivation provide preliminary support for a fully powered trial.

Source: European Eating Disorders Review

DOI: 10.1002/erv.70141

Authors: Dimitri Chubinidze, Zhuo Li, Ayse Gundogan, Karina L. Allen, Petr Slovak, Kate Tchanturia

Institutions: King's College London, South London and Maudsley NHS Foundation Trust, Ilia State University, Aalborg University

Language: English

Topic: Eating Disorders and Behaviors

Subfield: Clinical Psychology

Field: Psychology

Domain: Social Sciences

SDG: Good health and well-being

Open Access status: hybrid

Estimated APC paid: $4,330