Description

Tendency for people to assess similarity of objects and organize them based around the category prototype.

Kahneman, D., & Tversky, A. (1972). Subjective probability: A judgment of representativeness. Cognitive Psychology, 3, 430-454.

Tversky, A., & Kahneman, D. (1974). Judgment under uncertainty: Heuristics and biases. Science, 185(4157), 1124–1131.

Some studies have investigated biases produced by this heuristic in a grouped manner. In the study of Yoon et al. (2021), the scale includes items measuring the conjunction fallacy, base rate neglect, gambler's fallacy, misperception of randomness, and insensitivity to sample size.

Items (26)

See Yoon et al. (2021).

Scoring

Statistically or logically correct answers are scored as 1, and incorrect (biased) answers are scored as 0.

Source

Yoon, H., Scopelliti, I., & Morewedge, C. K. (2021). Decision making can be improved through observational learning. Organizational Behavior and Human Decision Processes, 162, 155–188.