Implicit and explicit processes in a hypothesis testing task

J.S.B.T. Evans, S. Venn, Aidan Feeney

Research output: Contribution to journalArticle

22 Citations (Scopus)


We present the results of two experiments investigating the factors that determine responding on the pseudo-diagnosticity task. In Expt I we manipulated people's beliefs about the degree to which an initial piece of evidence supported a focal hypothesis and found decreased pseudo-diagnostic (PD) responding when the evidence offered low support for the focal hypothesis. In Expt 2 we manipulated the instructions given to participants. We found that instructions to select evidence to help decide between the focal and the complementary hypotheses produced fewer PD responses than both instructions to decide whether the focal hypothesis was the case and instructions to decide whether its complement was the case. The results are interpreted within the framework of recent dual process theories of reasoning.
Original languageEnglish
Pages (from-to)31-46
Number of pages16
JournalBritish Journal of Psychology
Publication statusPublished - 2002

Cite this