Concurrent and predictive validity of two scales to assess the fidelity of implementation of supported employment.

The ability of the Individual Placement and Support (IPS) and the Quality of Supported Employment Implementation Scale (QSEIS) fidelity scales to predict independently rated SE adherence and percentage of clients closed by the Office of Vocational Rehabilitation (OVR) was tested at 23 SE sites. QSEIS Total score (r = .47), Integration subscale (r = .53), and Support subscales (r = .61) correlated with SE adherence. Total QSEIS score also predicted OVR closure rate (r = .42). Correlations between IPS (sub)scale scores and the criterion measures were non-significant. The results support QSEIS validity and provide evidence that fidelity to the SE model is associated with better employment outcomes.