Presents the drastic effects that selection on several variables can sometimes have on the validity of predictor variables. Discusses practical implications of correcting correlations for selection effects and reporting results of validity studies. (Author)

Integrated schools, family income, and regional differences were not a factor in achievements of Black professionals. Most were educated by parents only and service rather than money was the basis of career choice. Those in helping professions should consider successful Blacks in developing a mental health model. (JAC)

Economic factors serve to control the degree to which individual and work-related factors can explain variation in turnover. Individual and work-related variables will be more predictive of turnover under prosperous economic conditions than when the economy is strained. (Author)

Tested models of interests by examining the significance of disconfirmed ordinal predictions. Examined data regarding Holland's hexagonal model and Roe's circular ordering. Tested adequacy of the hierarchical model and compared significance of the disconfirmed predictions of the hierachical model to that of the hexagonal-circular model. (Author)

Describes a criterion group classification scheme commonly used in conjunction with discriminant function analysis and suggests that clinicians consider membership probabilities for each criterion group of interest. Illustrates this approach using data from a study in which discriminant analysis was used to identify characteristics of problem…

Evaluates the effectiveness of five admission models in predicting student performance in a Masters of Business Administration program. Found the regression model predicts graduate success better than the other models, but none of the models improved upon the admission officer's judgment. (Author/JAC)