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Bernstein, Lawrence; Burstein, Nancy – 1994
The inherent methodological problem in conducting research at multiple sites is how to best derive an overall estimate of program impact across multiple sites, best being the estimate that minimizes the mean square error, that is, the square of the difference between the observed and true values. An empirical example illustrates the use of the…
Descriptors: Bias, Comprehensive Programs, Data Analysis, Data Collection
Kingston, Neal M.; Holland, Paul W. – 1986
This study addresses the test-disclosure-related need for more Graduate Record Examinations (GRE) General Test editions in a situation where the number of examinees is stable or declining. Equating is used to guarantee that examinees of different test editions are treated equitably. The data collection designs used in this study were: (1)…
Descriptors: College Entrance Examinations, Data Collection, Equated Scores, Error of Measurement