On the measurement of conspiracy beliefs

Are so-called “birthers” best thought of as true conspiracy theorists, or are they merely partisans expressing a sharp dislike of Barack Obama? Recent work on conspiracy beliefs finds that “birthers” are the product of partisan and ideological motivated reasoning. In this manuscript, we explore how the measurement strategies we employ on public opinion surveys may influence the substantive conclusions we draw about conspiratorial beliefs, rumors, and misinformation. We find that partisan stimuli influence reported beliefs in several different conspiracy theories, and, subsequently, the relationships between individual stated beliefs in those conspiracy theories. The implications of these findings are discussed.