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Wason‘s Selection Task

Wason‘s Selection Task. The study of Wason (1966): Do people think logically? If yes, they should be able to solve a logically simple deductive reasoning task: Wason‘s selection task.

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Wason‘s Selection Task

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  1. Wason‘s Selection Task The study of Wason (1966): Do people think logically? If yes, they should be able to solve a logically simple deductive reasoning task: Wason‘s selection task. You see four cards. The rule is: If there is a vowel on one side of a card, then there is a an even number on the other side of the card. Which of these four cards need to be turned in order to test that the rule applies? E K 4 7 Contributor © POSbase 2003

  2. Wason‘s Selection Task Most people select just the E-card, but not the 7-card. This is a case of positive test strategy. However, others have shown that the task is simpler if it is less abstract (Griggs & Cox, 1982). The problem includes modus ponens inference and modus tollens: Modus ponens: If vowel then even number; E is a vowel  there must be an even number. Modus tollens: If vowel then even number; 7 is not an even number there must be no vowel. E K 4 7 © POSbase 2003

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