Measuring Support Provider’s Perspectives on Single-Session Therapy: Psychometric Evidence for SSTMS and BAT-Q

Objective Effective Single-Session Therapy (SST) hinges on the support provider’s specific perspectives that align with SST thinking. This study provides validity evidence for the scores of the Belief and Attitude Toward Therapy Questionnaire (BAT-Q) and develops the Single-Session Therapy Mindset Scale (SSTMS).Method A diverse global sample of 415 practicing and trainee mental health support providers involved with individual psychotherapy provided data online.Results The BAT-Q demonstrated strong psychometric properties in our sample (Cronbach’s α = 0.833), confirming its continued relevance and reliability. Exploratory Factor Analysis helped with item reduction of the newly developed SSTMS. It demonstrated internal consistency (Cronbach’s α = 0.826) and significant correlations with the BAT-Q. Receiver operating characteristic curve analysis could identify a cutoff value of 46/60 on SSTMS to identify support providers with the mindset for successful SST practice.Conclusions These scales empower researchers to explore SST implementation, training, and cultural impacts and support providers for self-assessment, ultimately advancing SST.