Masculinity, femininity, and multiple regression: comment on Zeldow, Daugherty, and Clark's "Masculinity, Femininity, and Psychosocial Adjustment in Medical Students: A 2-Year Follow-Up"

Inappropriate applications and interpretations of multiple regression analyses by Zeldow and his associated (Zeldow, Clark, & Daugherty, 1985; Zeldow, Daugherty, & Clark, 1987) are discussed as are several general interpretive and statistical issues. To perform and interpret multiple regressions, several characteristics of this statistical approach must be taken into account. Of critical importance is the order in which variables are entered, the choice of regression approaches, the direction of an effect upon entering the model, and the manner in which the interpretation of interaction effects varies as a function of the presence or absence of main effects. Because Zeldow et al. (1985, 1987) did not consider these factors, their regression analyses were not run as stated and are difficult to interpret. Five hypothetical outcomes in androgyny research and an example involving actual data are presented.