Communication, particularly in the form of self-disclosure or emotional expressiveness is important to happy, healthy relationships. Differences in emotional expressiveness between sexes, between socioeconomic groups, and within each of these groups were examined in 48 males and 44 females from high and low socioeconomic (SES) groups. Subjects completed the Emotional Expressiveness Scale, answering questions about love, anger, happiness, and sadness; they also designated the target person to whom these emotions were directed by checking responses for people, spouse, or child. The results indicated that females from both SES groups were more expressive in the emotions of happiness and sadness. High SES females appeared to be the most expressive of all groups. Individuals in the high SES group were significantly more expressive of anger to people and to their spouses, and more expressive of sadness to spouses than were low SES individuals. Low SES females were more expressive of happiness to people than were high SES males. All groups exhibited significantly greater expression of all emotions, except anger, to family members than to non-family members. Males exhibited more expressiveness to spouse than to child, whereas females did not differ significantly in the expression of love between spouse and child. (The Emotional Expessiveness Scale is appended.) (NRB)