Presentations of the history and range of mixed methods research presented in textbooks, handbooks, and journal articles have typically ignored a great deal of earlier and contemporary research that integrated qualitative and quantitative approaches, but did not explicitly identify itself as ''mixed methods.'' This article reviews earlier research, in both the natural and social sciences, that clearly integrated qualitative and quantitative approaches and methods, and discusses some contemporary research traditions that use such integration without labeling this ''mixed methods.'' Important implications of these studies and traditions for the conceptualization and conduct of mixed methods research are discussed. Keywords mixed methods history, mixed methods definition, qualitative and quantitative A prevalent view of the history of mixed methods research identifies the beginnings of this approach, or of its systematic development, with the work of Campbell and Fiske (1959) on triangulation, with a full flowering of actual mixed method studies in the 1980s. Typical statements are ones by Creswell and Plano Clark (2011): ''The formative period of mixed methods began in the 1950s and continued up until the 1980s. This period saw the initial interest in using more than one method in a study'' (p. 25), and ''During the late 1980s to early 1990s. .. [a number of individuals from different disciplines] were writing. .. on an approach to research that moved beyond simply using qualitative and quantitative methods as distinct, separate strands in a study'' (p. 20). Similarly, Teddlie and Tashakkori (2003), although they mention a ''substantial degree of important mixed methods research'' (p. 5) that took place between 1900 and 1950, say almost nothing about what was ''important'' in these studies, and state that the ''emergence of the first explicit multimethod designs'' did not occur until after 1950 (p. 6). 1 My argument in this article is that the discussion of mixed methods studies in textbooks and methodological publications on mixed methods research has often been narrow and myopic, both historically and in contemporary scope. Early research that clearly involved the joint use and integration of qualitative and quantitative approaches, but that predates the emergence of ''mixed methods research'' as a distinct and self-conscious strategy, is usually ignored or simply mentioned, with no discussion of what these studies might contribute to our understanding