Fundamental to effective human resource systems is the capture of data regarding work role requirements. However, previous research on factors that influence work role requirement judgments has been largely equivocal. From a sample of 203 incumbents, representing 73 unique occupations, we investigated 2 cognitive sources of influence on carelessness and discriminability in work role requirement judgments. We hypothesized that incumbents perceiving high role ambiguity would provide ratings that were more careless and showed less discriminability, and cognitively complex individuals would provide more careful and discriminating ratings. These influences were hypothesized to vary across different work descriptors and rating scales. Results were supportive, showing effects for cognitive complexity and role ambiguity on ratings, and differential effects depending on the focal descriptor and scale.