A new line of research has emerged that examines the prevalence rates of mixed methods within disciplines in the social/behavioral sciences. Research presented in this article is unique in that it examines prevalence rates across multiple disciplines using an established cross-disciplinary classification scheme. Results indicate that there are significant differences in the methods employed (quantitative, mixed, qualitative) in pure (psychology, sociology) as opposed to applied (education, nursing) disciplines. The prevalence rate for mixed methods research is higher in applied (16%) compared with pure disciplines (6%). Quantitative methods and the underlying postpositivistic paradigm are prevalent in articles from "elite" journals from pure disciplines, especially psychology. Methodological issues are discussed, including the importance of the sampling procedures employed in prevalence rates studies. (Contains 9 tables.)