While the world of politics is uncertain, previous work, both theoreti
cal and empirical, has largely failed to incorporate this uncertainty
into the analysis of public opinion and electoral behavior. In this ar
ticle we discuss measures designed to elicit the uncertainty survey re
spondents feel about their political perceptions. These measures exhib
it response patterns which are interpretable, substantively interestin
g, and consistent with a model relating uncertainty to citizen informa
tion costs. We also find that variation in respondent uncertainty lead
s to different models of perception of political figures and speaks to
models of the survey response. As a practical matter, our measures ca
n easily be incorporated into existing surveys with no disruption of c
ontinuity.