PSYC 221 Chapter Notes - Chapter 13: Relative Risk, Neuroeconomics, Organ Donation
4 Apr 2014
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Page 360-384, 24 pages page 1 of 9. Deductive reasoning: syllogisms & logic: decisions: making choices between alternatives. Similarly, in a two-alternative forced choice detection task, you either answer yes or. No : deductive reasoning: using sequences of statements called syllogisms (invented by aristotle), to arrive at a definitive conclusion, syllogism: consists of two premises, followed by a conclusion. In a categorical syllogism, the statements begin with all, no, or some: premise 1: all dogs are canines, premise 2: all canines chase felines, conclusion: therefore, all dogs chase felines, others: no a are b; some a are. Validity and truth in syllogisms: validity: a syllogism is valid when its conclusion follows logically from its two premises. In the above example: premise 1: all a are b, premise 2: all b are c, conclusion: all a are c, validity depends on the form of the syllogism.
