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Das, J. P.; Kirby, John R. – Journal of Educational Psychology, 1978
Humphreys' comments on double-median splits (TM 504 009) are essentially correct, but are not relevant to the original Kirby and Das article (EJ 182 444). His comments do not weaken our findings. (Author/RD)
Descriptors: Analysis of Variance, Data Analysis, Individual Differences, Predictor Variables
Peer reviewed Peer reviewed
Humphreys, Lloyd G. – Journal of Educational Psychology, 1978
Kirby and Das (EJ 182 444) dichotomized measures of individual differences and treated them as independent variables in an analysis of variance. Correlational analysis would have provided more powerful tests of their hypotheses. Interpretation of the dichotomized variables as independent, causal antecedents of their measures of intelligence would…
Descriptors: Analysis of Variance, Correlation, Data Analysis, Individual Differences
Peer reviewed Peer reviewed
Walsh, John; Winne, Philip H. – Journal of Educational Psychology, 1980
Data in Yarworth and Gauthier's article on student self- concept and participation in school activities (EJ 189 606) were reanalyzed by Walsh and Winne (TM 505 375). Yarworth and Gauthier's criticism of the reanalysis (TM 505 376) is answered. (GDC)
Descriptors: Extracurricular Activities, High Schools, Hypothesis Testing, Multiple Regression Analysis
Peer reviewed Peer reviewed
Gauthier, William J., Jr.; Yaworth, Joseph S. – Journal of Educational Psychology, 1980
Winne and Walsh's Reanalysis (EJ 229 157) of Gauthier and Yarworth's study of self-concept and participation in high school activities (EJ 189 606) is addressed, particularly with respect to the statistical techniques used. The intentions of the original article are also clarified. (GDC)
Descriptors: Extracurricular Activities, High Schools, Hypothesis Testing, Multiple Regression Analysis
Peer reviewed Peer reviewed
Winne, Philip H.; Walsh, John – Journal of Educational Psychology, 1980
Yarworth and Gauthier (EJ 189 606) examined whether self-concept variables enhanced predictions about students' participation in school activities, using unstructured stepwise regression techniques. A reanalysis of their data using hierarchial regression models tested their hypothesis more appropriately, and uncovered multicollinearity and…
Descriptors: Extracurricular Activities, High Schools, Hypothesis Testing, Multiple Regression Analysis