MEASURING THE IMPACT OF SESSIONS IN-PROCESS EXPERIENTIAL THERAPY OF DEPRESSION - THE SESSION IMPACTS SCALE

The Session Impacts Scale (SIS) is a brief client-report measure of the experienced impacts of therapy sessions. Data were collected from depressed clients seen in short-term process-experiential treatment. Factor analyses were consistent with the expected hierarchical structure of the measure (Helpful Impacts and Hindering Impacts, with Helpful Impacts divided into Task Impacts and Relationship Impacts subscales). Internal reliabilities were excellent for the helpful impact scales, and the pattern of impacts was consistent with the treatment model. Helpful impact scales were most strongly correlated with client Session Evaluation Questionnaire Depth and Positivity scales and client global helpfulness ratings. A components of variance analysis suggested that client and therapist factors account for large amounts of variance in SIS ratings, some of which could be predicted.