Construct Validity of Outcome Rating Scale (ORS) Scores in Clinical Samples: Extension of Harris, Murphy, and Rakes' (2019) Narrative Review.

Purpose: A recent review of 24 studies primarily evaluated psychometric properties of the Outcome Rating Scale (ORS) related to coefficient alpha and convergent validity.

Method: To provide a fuller picture, this review examined effect size (ES) estimates and the full range of correlations between ORS scores and related measures.

Results: Mean ORS ESs equaled 1.00 for 44 comparison periods. ORS scores correlated highest with measures of depression and evidenced larger ESs in depression treatments.

Discussion: The ORS functions as a robust measure for detecting client progress in clinical samples that were primarily young, female, and Caucasian. Some results suggest ORS scores primarily reflect a rapid response to interventions.

Conclusion And Limitations: Future research should assess ORS scores' psychometric properties in response to interventions with more heterogeneous client samples as well as its capacity to monitor change beyond initial sessions.