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Roper Center for Public Opinion Research

The Roper Center for Public Opinion Research, which now is located at the University of Connecticut, and is one of the world's largest collections of data on the social sciences, was founded at Williams College in 1946 by Elmo Roper, who anticipated the future value of the studies he and other survey research pioneers were conducting to better understand what was on the collective minds of the public. His vision was of the academic scholar in pursuit of the thoughts, opinions, and behaviors of the common person during the early days of polling. Shortly thereafter he was joined by George Gallup, Sr. who contributed his 17 years of data, followed by Archibald Crossley, the National Opinion Research Center, Opinion Research Corporation, and the earliest state polls from Minnesota, Texas, and Iowa. More than six decades later, the Roper Center archives are the largest archives of survey data in existence, including the work of more than 250 survey organizations, representing thousands of studies and hundreds of thousands of questions asked in the United States and abroad. A list of the center's data contributors reads like a “who's who” of the profession, including the major news media—paper and electronic—that sponsor and conduct surveys on a multitude of topics.

This comprehensive collection has fulfilled Elmo Roper's dream that the data be preserved for future generations. However, today the center's role of data steward goes beyond preservation measures and has expanded to include the provision of easy access tools to facilitate use of the collection. The center's membership includes nearly every major university in the United States and several in Europe and elsewhere.

The Tools

The iPOLL database contains a half-million questions and responses from surveys conducted in the United States since 1935. Using simple search terms, it is possible to identify hundreds of relevant questions on most public policy and social issues in a matter of seconds. Of these half-million questions, about 60% are from surveys where the entire data set has been archived with the Roper Center; the other 40% are from surveys that have yet to arrive, are only available in report form, or are archived elsewhere. Using the integrated RoperExpress service, it is possible to move directly from a question in the iPOLL database to the documentation and download the data set, as well. This service permits researchers to conduct secondary analyses (e.g. cross-tabulations that reveal more details about respondents answering in a particular way) on their desktop computers.

The drill-down functionality that permits this on-demand download of the documentation and data files is distinctive to the Roper Center's data archives. Although systems exist that permit searching at the question level, most of those organizations do not maintain the raw data set files. Conversely, there are institutions that offer direct download of data set files but have not developed a question-level retrieval system.

Contributions to the Field

To improve the understanding of the public in the aggregate, the Roper Center partners with those who conduct survey research. To achieve this, it has developed systems that permit broad access and utilization of the data entrusted to its care. Additionally, the Roper Center Web site offers educational modules to acquaint researchers with the fundamentals of opinion polling and to assist with interpreting results.

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