In recent years there has been a growing research interest in sex differences in speech (e.g., Thorne and Henley, 1975; Thorne et al., 1983). Conversational behavior, it was once argued, can be viewed as having a "male dialect" and a "female dialect" (Kramer, 1974). More recent commentators feel that such a conceptualization exaggerates and at the same time oversimplifies the differences between men's and women's speech (Thorne et al., 1983: 14). However, neither these authors, nor any others, deny that there are significant sex differences in verbal interaction.As various sex differences were observed, some authors began to look at possible reasons for their existence and at their implications. Notably, some researchers (cf. Fishman, 1978; *Direct all correspondence to: Peter Kollock, Philip Blumstein, and Pepper Schwartz, Department of Sociology, DK-40, University of Washington, Seattle, WA 98195.This research was supported in part by NSF grant SES-7617497 and a research assistantship to the first author from the Graduate School of the University of Washington. A draft of this paper was presented at the Annual Meeting of the American Sociological Association, San Antonio, 1984.The authors are grateful to these colleagues for comments on an earlier draft of this paper: Nancy Durbin, Mary Rogers Gillmore, Laurie Russell Hatch, Judith A. Howard, Mary Savage Leber, Anne Martin, Barbara Risman, Donald Stull and Toshio Yamagishi. We would also like to thank Sandra Hayashi for her work in coding the conversations. Thorne and Henley, 1975) felt that these differences were tied not solely to sex, but to power as well. In looking, for example, at differences in the amount of time spent talking, at terms of address, and at intenuption patterns, the implication was that observed sex differences in language mirror the overall difference in power between men and women, and that the way in which people communicate reflects and reinforces the hierarchical relationships that exist around them.As intriguing or intuitively appealing as these questions may be, there have been few studies to test empirically what relationship power and sex have to the observed differences in men's and women's speech.