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  1. Ruma Falk (2011). When Truisms Clash: Coping with a Counterintuitive Problem Concerning the Notorious Two-Child Family. Thinking and Reasoning 17 (4):353 - 366.
    You know that a two-child family has a son. What is the probability that the family has two sons? And what is this probability if you know that the family has a son born on a Tuesday? The former question has been widely discussed previously. The latter adds a new puzzling twist to the situation. In both cases the answer should depend on the specifics of the assumed underlying procedure by which the given information has been obtained. Quantitative analysis, assuming (...)
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  2. Raymond S. Nickerson & Ruma Falk (2006). The Exchange Paradox: Probabilistic and Cognitive Analysis of a Psychological Conundrum. Thinking and Reasoning 12 (2):181 – 213.
    The term “exchange paradox” refers to a situation in which it appears to be advantageous for each of two holders of an envelope containing some amount of money to always exchange his or her envelope for that of the other individual, which they know contains either half or twice their own amount. We review several versions of the problem and show that resolving the paradox depends on the specifics of the situation, which must be disambiguated, and on the player's beliefs. (...)
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  3. Paul Bertelson, Ruth M. J. Byrne, Stanislas Dehaene, Ruma Falk, Gerd Gigerenzer, Klaus Hug, Phillip N. Johnson-Laird, Susan Jones, Peter W. Jusczyk & Barbara Landau (1992). Ex 0. Cognition 43:2.
     
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  4. Ruma Falk (1992). A Closer Look at the Probabilities of the Notorious Three Prisoners. Cognition 43 (3):197-223.
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  5. Maya Bar-Hillel & Ruma Falk (1982). Some Teasers Concerning Conditional Probabilities. Cognition 11 (2):109-122.
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