Autori
Matarazzo, Olimpia
Baldassarre, Ivana

Titolo
Effetti delle istruzioni sperimentali e della probabilità in un compito di inferenza con enunciati di forma se p allora non-q
Periodico
Sistemi intelligenti
Anno: 2010 - Volume: 0 - Fascicolo: 3 - Pagina iniziale: 407 - Pagina finale: 418

According to psychological theories dealing with propositional logic, conditional reasoning is a form of deductive reasoning. On the contrary, theories referring to Ramsey's suppositional interpretation posit that conditional statement (if p then q) is equivalent to the conditional probability of the consequent (q) given the antecedent (p) and that conditional reasoning is a form of probabilistic reasoning. This study compared the two competing hypotheses through an inference task where conditional syllogisms were presented with both premises (major premise «if p then not-q» and minor premises p, not-p not-q, q) or with minor premise only, and the conditional probability of «if p then not-q», the antecedent size and the consequent size were separately varied. In relation to Modus Ponens, results showed that, with the complete conditional syllogism, neither the conditional probability of «if p then not-q» nor the p and not-q size affected this inference. The theoretical implications are discussed in the text.



SICI: 1120-9550(2010)0:3<407:EDISED>2.0.ZU;2-J
Testo completo: http://www.mulino.it/ws/rwDirectDownload.php?doi=10.1422/33540
Testo completo alternativo: http://www.mulino.it/rivisteweb/scheda_articolo.php?id_articolo=33540

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