This is a unique investigation that is particular to the needs of this special issue of Human Communication Research (HCR). Specifically, this study analyzes the media effects research that has been published in HCR during the past 25 years via meta-analysis. Numerous significantfindings point to various themes and trends regarding media research in HCR.First, age is related to processing ability, understanding, and attending to media such that as children age, they better understand media messages. Second, the mass mediaarea sign@ant source of learning. Third, the media can influence attitudes, which in turn, may influence or shape behaviors. Political, social, and educational implications of thefindings are discussed. In addition, directions forfuture research, including the use ofrneta-analysis as a m e f~d o l o g~~l tool, are discussed, as is the social responsibility of scholars in exploring the positive effects of media as opposed to ones with potentially antisocial outcomes. s we approach the millennium and retrospectively view the state of media technologies and the vast array of research on A media and media effects, we realize the tremendous contribution that Human Communication Research (HCR) has made to our understanding of the past and present and to our preparation for the future. In offering communication scholars the forum to report current research, critique research of the past, and introduce new, fresh perspectives for the future, HCR has undoubtedly played a pioneering role in the academic community's understanding of human communication. Tara M . Emmers-Sommer (Ph.D., Ohio University, 1995) is an assistant professor in the Department of Communication at the University of Oklahoma. Mike Allen (Ph.D., Michigan State University, 1987) is a professor in the Department of Communication at the University of Wisconsin-Milwaukee. The authors thank John Tedesco for his insight on historical trends and editors Bob McPhee and Ed Fink for their helpful comments on an earlier version of this article.