A multivariate study focused on external relationships between (a) demographic variables and (b) psychological sex roles and communication apprehension variables. It also investigated differences among psychological sex types and biological sex types with respect to social desirability, speech apprehension, and listening apprehension at the junior high, senior high, college, and composite levels. The subjects for the study were 157 junior high students, 154 senior high students, and 181 college students. Each subject completed a four-part questionnaire consisting of a sex-role inventory, a communication apprehension measure, a receiver apprehension test, and a section requesting demographic information. Correlational analyses revealed that older subjects had higher masculine and feminine scores. Other results indicated that significant differences existed among psychological sex types at each educational level on dependent measures. Biological sex results did not support previous literature. The findings also revealed that college students were five times more likely to be androgynous than junior high students and two times more likely than senior high students. Junior high students, however, held a 4 to 1 ratio over college students and a 2 to 1 ratio over senior high students in the undifferentiated category. (Fourteen tables of data are appended.) (Author/FL)