Environmental assessment and evaluation research: examples from mental health and substance abuse programs.

Evaluation researchers have been broadening the traditional client input--"black box" treatment--client outcome paradigm that has guided many evaluations of mental health, substance abuse treatment, and other intervention programs. The points of expansion are in the areas of treatment implementation and treatment processes, as well as "extratreatment" influences on treatment selection, duration, and, especially, outcome. This review illustrates the application of environmental assessment procedures--particularly social climate measures--in four aspects of evaluation research suggested by the more comprehensive model: (a) evaluating treatment implementation; (b) exploring treatment processes; (c) identifying extratreatment influences on client posttreatment functioning; and (d) operationalizing outcome variables. Conceptual and methodological issues raised by these applications are discussed, and the benefits to be derived from an expanded model of evaluation research--especially the greater potential for program improvement--are considered.