Objectives: This article describes the Standard Interview for Evidence Use (SIEU), a measure to assess the level of engagement in acquiring, evaluating, and applying research evidence in health and social service settings. Method: Three scales measuring input, process, and output of research evidence and eight subscales were identified using principal axis factor analysis and parallel analysis of data collected from 202 state and county child welfare, mental health, and juvenile justice systems leaders. Results: The SIEU scales and subscales demonstrate strong internal consistency as well as convergent and discriminant validity. Conclusions: The SIEU is easy to use and can be administered as a complete scale or as three smaller scales to separately examine evidence in acquisition, evaluation, or application. The measure demonstrates potential in understanding the role of research evidence in service settings and in monitoring the process of evidence-based practice and application of scientific principles in social work practice.