2013scoboriafisicojepappdkencouraged.doc

# All participants were asked the questions in a fixed

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All participants were asked the questions in a fixed order. The interviewer recorded responses verbatim and recorded confidence for each substantive (non-DK) response. After the

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ENCOURAGING AND CLARIFYING DON’T KNOW RESPONSES… 13 differences between the groups in accuracy: answerable, F (2,75) = 1.32, p = .272, ω 2 = .01, unanswerable, F (2,75) = 1.31, p = .274, ω 2 = .01; nor correct responses: answerable, F (2,75) = 0.69, p = .504, ω 2 = .00, unanswerable, F (2,75) = 0.17, p = .844, ω 2 = .00. Clarification and Recoding of Don’t Know Responses To remind, participants clarified the meanings of initial DK responses, which were recoded as correct or erroneous depending on the objective nature of the question. A majority of DK responses (70%) were clarified, and the encouraged group clarified the most responses. After recoding, the groups no longer differed in total output: answerable, F (1,75) = 1.01, p = .370, ω 2 = .00; unanswerable, F (1,75) = 1.42, p = .248, ω 2 = .01. A main effect of group for errors to answerable questions, F (2,75) = 3.73, p = .029, ω 2 = .07, was because encouraged respondents continued to make fewer errors, t (76) = 2.51, p = .014, d = 0.61. The effect for unanswerable errors was non-significant, F (2,75) = 1.71, p = .188, ω 2 = .00. The groups did not differ in accuracy or correct responses. Per within subjects ANOVAs (initial vs. clarified responses),

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• Fall '17
• Jane Moore
• Centrifugation, Journal of Experimental Psychology, Fourteen unanswerable questions, dk responses, Alan Scoboria

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