Abstract
Ss made decisions in a two-choice task following 3, 9, and 19 items of information, and rated their confidence in their decisions. When the likelihood of the informative events was constant, confidence was inversely related to sample size. The results were the reverse of findings in studies of the sequential revision of confidence.
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Brody, N. The effect of commitment to correct and incorrect decisions on confidence in a sequential decision task. Amer. J. Psychol., 1965, 78, 251–256.
Gibson, R. S., & Nicol, E. H. The modifiability of decisions made in a changing environment. Decision Sciences Lab., Electronic Systems Div., Air Force Systems Command, USAF, 1964.
Peterson, C. R., Schneider, R. J., & Miller, A. J. Sample size and the revision of subjective probabilities. J. exp. Psychol., 1965, 69, 522–527.
Pitz, G. F. The sequential judgment of proportion and probability. Final Report, PHS Research Grant, MH 10167-01.
Pitz, G. F., Downing, L., & Reinhold, H. Sequential effects in the revision of subjective probabilities. Canad. J. Psychol., in press, 1967.
Pitz, G. F., & Reinhold, H. Payoff effects in sequential decision making. Paper presented at Midwestern Psychol. Assoc., Chicago, 1967.
Pruitt, D. G. Informational requirements in making decisions. Amer. J. Psychol., 1961, 74, 433–439.
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1. This study was supported by a grant from the Psychiatric Training and Research Authority of the Illinois Department of Mental Health.
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Pitz, G.F. Sample size, likelihood, and confidence in a decision. Psychon Sci 8, 257–258 (1967). https://doi.org/10.3758/BF03331649
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DOI: https://doi.org/10.3758/BF03331649