Routine Outcome Changes Associated with Brief Psychological Interventions Delivered by Assistant Psychologists and Trainee Associate Psychology Practitioners in a Crisis Resolution and Home Treatment Team.

Psychological interventions are recommended for people under Crisis Resolution Home Treatment Teams (CRHTTs). Non-registered psychology roles (Assistant Psychologists (APs) and Trainee Associate Psychological Practitioners (TAPPs)) are potentially both cost and clinically effective for delivering brief interventions in CRHTTs. This study aimed to quantitatively examine routine outcome change associated with two brief, skills-based interventions (the Crisis Toolbox (CTB) and the Emotion Coping Skills (ECS)) delivered by APs and TAPPs in one CRHTT. A retrospective service evaluation of 490 service users who accessed either the CTB or ECS between June 2020 and February 2025 was employed. The Clinical Outcomes in Routine Evaluation - 10 (Core-10) and Mental Health Confidence Scale (MHCS) measures were completed pre- and post- intervention. Paired samples t-tests were conducted and demographics (age, gender, and ethnicity) collected. There was a statistically significant effect in improving scores on both measures at the post-intervention timepoint (CORE-10: 8.636, 95% CI [7.810 to 9.461], t(297) = 20.586, p < .001; MHCS: -13.537, 95% CI [-14.827 to -12.237], t{293) = -20.568, p < .001). This significant effect remained when looking at males and females separately. Asian and Black ethnic groups were underrepresented in the sample compared to local demographics, whilst other ethnic groups showed similar representation. Findings suggest that CTB and ECS may be clinically effective in reducing distress and increasing confidence in coping with mental health challenges for service users. Additionally, this evaluation has highlighted the need for better understanding UK ethnic minority representation in CRHTTs and consideration of possible barriers to access.