Illicit drug use remains at high levels in the U.S. The federal Office of National Drug Control Policy evaluates the outcomes of national drug demand reduction policies by assessing annual changes in drug use from several federally sponsored annual national surveys. Such survey methods, relying exclusively on drug use as self-reported on…

The goal of this article is to contribute to the validation of a self-evaluation method, which can be used by schools to evaluate the quality of their Competence Assessment Program (CAP). The outcomes of the self-evaluations of two schools are systematically compared: a novice school with little experience in competence-based education and…

The Combined Modified Design is presented to overcome problems of internal and external validity in the conduct of true experiments in longitudinal studies. It combines a modified version of the Randomized Invitation Design with the lottery longitudinal experimental field trial situation. (SLD)

Results of empirical validation studies of six statistical models available for indirectly estimating the need for alcohol, drug abuse, and mental health services across a large geographic area are presented. Models were evaluated using Colorado Social Health Survey data for 4,745 adults from 48 subareas of Colorado. (SLD)

Reports on the use of the tailored design method (TDM) to achieve high survey response in two separate studies of the dissemination of Treatment Improvement Protocols (TIPs). Findings from these two studies identify six factors may have influenced nonresponse, and show that use of TDM does not, in itself, guarantee a high response rate. (SLD)

A fuzzy set model is offered for interpreting vague frequency expressions, such as "rarely" and "sometimes." Results with 152 undergraduates reporting marijuana use reflect different frequency expressions for the same level of use and suggest that self-report validity may be enhanced by analyzing frequency expressions as fuzzy…

The development and psychometric assessment of a Risk of Hospitalization Scale are described. The scale, designed to help case managers for the seriously mentally ill meet clients' needs, demonstrates satisfactory reliability and validity for 18 vignettes and 60 actual cases. The scale has been adopted for use in New Jersey. (SLD)

A strategy proposed by T. Cook and D. Campbell (1979) was used to investigate attrition in a community-based literacy program, focusing on 287 Head Start families. Data revealed interactions among intervention program-centered characteristics and person-centered characteristics that have implications for study validity and generalizability.…

A scale was developed for measuring the persuasive impact of qualitative and quantitative evaluation reports on decision makers. Using two exploratory (n=192 graduate and undergraduate students) and two confirmatory (n=200 administrators) samples, researchers developed a 28-item Likert-type scale that demonstrated high reliability and validity.…

An 82-item multidimensional questionnaire, the Verona Service Satisfaction Scale, was recently developed in Italy to measure client satisfaction with psychiatric services. The scale contains 29 items from the English Service Satisfaction Scale. Psychometric characteristics and test use are discussed. Results support the use of the scale in service…

The six articles of this special section address the organizational context that shapes utilization of mental health services, the relevance of data elements and results to decision making, and assuring the validity of evaluation results. Theoretical and practical concerns are considered. (SLD)