Describes two invariance tests, the jackknife procedure and Procrustean rotation, and applies them in a discriminant analysis for this heuristic study. Invariance testing helps to prevent overemphasis on findings of statistical significance and overgeneralization of a research result, and thus is gaining favor as an indicator of result importance.…

The correction for attenuation formulas for partial, multiple, and canonical correlation coefficients are discussed and the effects of measurement errors on these statistics are explored. The notation is standardized and the derivation extended where appropriate. It is shown that as the reliabilities of the predictors become more disparate, the…

Conducted a Monte Carlo computer simulation of the ANOVA design to detect job differences. The design proved reasonably powerful in detecting differences. A second study used Monte Carlo methods to analyze the viability of techniques for determining job differences. Offers guidelines for selecting statistical techniques. (Author/RC)

THIS PAPER DEALS WITH SOME TESTS OF HYPOTHESIS FREQUENTLY ENCOUNTERED IN THE ANALYSIS OF MULTIVARIATE DATA. THE TYPE OF HYPOTHESIS CONSIDERED IS THAT WHICH THE STATISTICIAN CAN ANSWER IN THE NEGATIVE OR AFFIRMATIVE. THE DOOLITTLE METHOD MAKES IT POSSIBLE TO EVALUATE THE DETERMINANT OF A MATRIX OF HIGH ORDER, TO SOLVE A MATRIX EQUATION, OR TO…

TWO TYPES OF COUNSELING PROGRAMS WERE COMPARED BY RANDOM ASSIGNMENT OF 30 COUNSELORS TO TWO PRACTICUM TREATMENTS. FIFTEEN COUNSELORS RECEIVED 60 HOURS OF COUNSELING EXPERIENCE CONCENTRATED INTO THE LAST 3 MONTHS OF A YEAR-LONG TRAINING PROGRAM. ANOTHER 15 RECEIVED 60 HOURS DISTRIBUTED IN THE LAST 6 MONTHS. SUPERVISING STAFF AND METHODS OF…

The suppressor variable, a variable wholly uncorrelated with a criterion, but which nevertheless improves prediction because of its relationship with a predictor, is critically examined. For a suppressor so defined, formal identities are shown with part, partial, and multiple correlational procedures. It is demonstrated that if maximum prediction…

In an effort to improve the predictability of course grades in the College of Fine and Applied Arts the Torrance Figural Test (Form B) of Creative Thinking was administered to entering 1968 freshmen. Four figural creativity variables (Fluency, Flexibility, Originality, and Elaboration) were correlated with course grades, American College Testing…