Three semantic differential items measure the extent to which a person feels certain and confident in a particular judgment. The scale has been applied to assessments of product quality, product performance perceptions, and health risk estimates. Items anchor uncertainty versus certainty, unsureness versus sureness, and lack of confidence versus confidence.
Urbany, J. E., Bearden, W. O., Kaicker, A., & Smith-de Borrero, M. (1997). Transaction utility effects when quality is uncertain. Journal of the Academy of Marketing Science, 25(1), 45–55.
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