Similarity scaling often requires subjects to produce such a large number of judgments that fatigue may become a problem. Yet it remains unclear just how respondent fatigue affects similarity perceptions and resulting judgments. The present study uses a categorization perspective to examine the effects of fatigue on similarity judgments. The results suggest that subjects rely increasingly on category membership as they progress through a similarity judgment task.
Johnson, M. D., Lehmann, D. R., & Horne, D. R. (1990). The effects of fatigue on judgments of interproduct similarity[Electronic version]. Retrieved [insert date], from Cornell University, School of Hotel Administration site: http://scholarship.sha.cornell.edu/articles/682