Contends that theoretical and conceptual problems relating to the validation of assessment centers must be resolved before quantitative validation methods may be used. An open design is suggested to facilitate conceptual clarification. (CH)

ifferent evaluation models were applied to data from a high school career education program to investigate problems in statistical conclusion validity and program effectiveness judgments. If potential threats to internal validity are analyzed and protection strategies are developed, more confidence in unplanned ex post facto design using a…

Intended for use by educators and the public, this report interprets the findings of two research studies on competency-based vocational education (CBVE) in Kentucky secondary schools: "The Development of an Instrument to Measure Student Attitudes toward Competency-Based Individualized Instructional Modules," by John C. Thomas, and…