The instrumental-expressive differentiation, employed extensively by Talcott Parsons, has been applied to the field of voluntary associations by several writers. Thus, Lundberg, Komarovsky, and McInery wrote of instrumental, mixed, and leisure associations in an early study, and Rose concerned himself with two types of associations, the social influence group and the expressive group. This means of classifying voluntary associations has appeared recently in at least one introductory sociology textbook. A recent impetus to the use of the instrumental-expressive categorization in this field was the publication by Gordon and Babchuk of a typology of associations utilizing this concept. They define the ideal type of instrumental association as differing from the ideal type of expressive association in the following three ways. (1) The member of the expressive association achieves immediate and continuing gratification from taking part in the organization's activities. The instrumental association member may even find the group's activities distasteful, but he will get satisfaction from the knowledge that they help to accomplish certain long-range goals. In other words, personal gratification is more remote (in terms of time) from participation in the group's activities for the member of the instrumental group than the member of the expressive group. (2) The activities of the instrumental association tend to be externally oriented, whereas those of the expressive association are focused inward. Expressive organizations "perform a function primarily for the individual participants through activities confined and self-contained within the organization itself…. In contrast, the major function and orientation of the instrumental organization are related to activities which take place outside the organization." (3) The activities of members of expressive associations represent ends in themselves, while, for instrumental association members, participation in the group's activities is seen as a means of accomplishing external, long-range goals. The major questions raised in this paper are whether members of instrumental associations differ predictably from members of expressive associations regarding (1) the manner in which persons become members of associations and (2) their involvement in primary group situations. [ABSTRACT FROM AUTHOR]