The SRC Panel Data and Mass Political Attitudes

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Abstract
One of the richest data sources for the study of public opinion is the Survey Research Center's panel study conducted in the late 1950s. Because the SRC interviewed its national panel of Americans three times over a four-year period, the SRC panel data allows the analysis of changes in survey responses over time. The most remarkable discovery from the SRC panel was that panelists changed their reported opinions on policy issues with considerable frequency when asked the same policy questions in different years. Moreover, the amount of observed change in the individual responses varied little with the time interval between responses. That is, the correlations between responses to the same issue item in 1956 and 1958 or in 1958 and 1960 (two years apart) were almost as low as the correlations to the same issue item in 1956 and 1960 (four years apart).

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