Introduction to Cognitive Science
Linda is 31 years old, single, outspoken, and very bright. She majored in philosophy. As a student, she was deeply concerned with issues of discimination and social justice, and also participated in antinuclear demonstrations.

Please rank the following statements by their probability, using 1 for the most probable and 8 for the least probable:

  1. Linda is a teacher in elementary school.

  2. Linda works in a bookstore and takes Yoga classes.

  3. Linda is active in the feminist movement.

  4. Linda is a psychiatric social worker.

  5. Linda is a member of the League of Women Voters.

  6. Linda is a bank teller.

  7. Linda is an insurance salesperson.

  8. Linda is a bank teller and is active in the feminist movement.

— Tversky, Amos; & Kahneman, Daniel (1983), "Extensional Versus Intuitive Reasoning: The Conjunction Fallacy in Probability Judgment", Psychological Review 90(4) (October): 293-315.

Copyright © 2007 by William J. Rapaport (