Reasons for confidence.

People are often overconfident in evaluating the correctness of their knowledge. The present studies investigated the possibility that assessment of confidence is biased by attempts to justify one's chosen answer. These attempts include selectively focusing on evidence supporting the chosen answer and disregarding evidence contradicting it. Experiment 1 presented subjects with two-alternative questions and required them to list reasons for and against each of the alternatives prior to choosing an answer and assessing the probability of its being correct. This procedure produced a marked improvement in the appropriateness of confidence judgments. Experiment 2 simplified the manipulation by asking subjects first to choose an answer and then to list (a) one reason supporting that choice, (b) one reason contradicting it, or (c) one reason supporting and one reason contradicting. Only the listing of contradicting reasons improved the appropriateness of confidence. Correlational analyses of the data of Experiment 1 strongly suggested that the confidence depends on the amount and strength of the evidence supporting the answer chosen.

[1]  G. Brier.  VERIFICATION OF FORECASTS EXPRESSED IN TERMS OF PROBABILITY , 1950 .

[2]  P. A. Adams,et al.  Realism of confidence judgments. , 1961, Psychological review.

[3]  J. Smedslund.  THE CONCEPT OF CORRELATION IN ADULTS , 1963 .

[4]  J. Hart,et al.  Memory and the feeling-of-knowing experience. , 1965, Journal of educational psychology.

[5]  B. Murdock.  The criterion problem in short-term memory. , 1966, Journal of experimental psychology.

[6]  J. Hart,et al.  Memory and the memory-monitoring process , 1967 .

[7]  P. Johnson-Laird,et al.  A theoretical analysis of insight into a reasoning task , 1970 .

[8]  E. Tulving,et al.  Retrieval processes in recognition memory: Effects of associative context , 1971 .

[9]  M. Blake.  Prediction of recognition when recall fails: Exploring the feeling-of-knowing phenomenon , 1973 .

[10]  A. H. Murphy.  A New Vector Partition of the Probability Score , 1973 .

[11]  Freda Conway,et al.  Bayesian Statistics for Social Scientists. , 1974 .

[12]  M. Gruneberg,et al.  ‘Feeling of knowing’ and cued recall ☆ , 1974 .

[13]  Eleanor H. Warnock,et al.  Reasoning from Incomplete Knowledge. , 1975 .

[14]  S. Lichtenstein,et al.  Do those who know more also know more about how much they know?*1 , 1977 .

[15]  B. Fischhoff,et al.  Perceived Informativeness of Facts. , 1977 .

[16]  Baruch Fischhoff,et al.  Calibration of Probabilities: The State of the Art , 1977 .

[17]  B. Fischhoff,et al.  Knowing with Certainty: The Appropriateness of Extreme Confidence. , 1977 .

[18]  I. Lieblich,et al.  A study of memory pointers , 1977 .

[19]  B. Fischhoff,et al.  On the Psychology of Experimental Surprises. , 1977 .

[20]  B. Fischhoff,et al.  Training for calibration. , 1980 .