Specific interviewer characteristics, interviewer continuity, or matching interviewer and household characteristics may increase cooperation, especially for difficult-to-convince households. In face-to-face surveys, unobserved heterogeneity often makes a proper analysis of interviewer effects impossible. Although surveys conducted in telephone…

Despite much literature on interviewer effects, limited attention has been paid to party preference surveys, although the effect is expectedly strong in this field. This article analyzes interviewer effects in a face-to-face political survey. Specifically, we are interested in whether the interviewer's own party preference has an effect on the…

Several studies have shown that people photographed wearing eyeglasses were perceived more positively as to intelligence and honesty. However, the effect of wearing glasses on behavior and in real face-to-face relationships has never been examined. In two studies, interviewers wearing or not wearing eyeglasses were instructed to ask people in the…