This article empirically explores possible relationships between language practices and the acquisition of gender identity. I propose a framework for analyzing the language of social identification underlying the usage of identifying categorical terms and then use this framework to analyze segments of interaction recorded in two preschools. On the basis of this analysis, I propose a distinctively sociological theory of gender identity acquisition and suggest that the proposed analytical framework may provide the basis for a more general sociological psychology.Influenced by the thought of George Herbert Mead, a number of sociologists and social psychologists have argued that verbal labeling has a profound influence on individuals' definitions of self (e.g.. Allport 1961, pp. 114-1 17;Foote 1951;Markey 1928; Strauss 1969). Yet, few (e.g., Denzin 1972; Hadden and Lester 1978) have systematically studied possible relationships between language practices' and the bestowal, appropriation and display of social identities. As a result, the promise of a sociological psychology which Berger and Luckmann (1966, p. 186) found in "the theoretical core of the thought of Mead and his school" has not been fully realized. The purpose of this article is to illustrate that investigation of relationships between language practices and selfdefinition can make an important contribution to the development as a distinctively sociological psychology. In order to d o so. possible relationships between language practices and the bestowal and appropriation of a particular identity-gender-are empirically explored. Due to both its biographical timing and significance, the process of gender identity acquisition is uniquely suited for this purpose. As John Money (1980, p. 33) has noted.