Hypothesis generation, probability judgment, and individual differences in working memory capacity.

This research examined the role of working memory (WM) in probability judgment and hypothesis generation using a simulated task that involved estimating the likelihood that particular menu items would be ordered by customers at a dinner. Five main findings were observed. First, judgments of the likelihood of individual items were made relative to alternatives retrieved from long-term memory. Second, the number of alternatives retrieved was positively correlated with a measure of WM-capacity (the operation-span task). Third, participants' probability judgments were subadditive (summing to well over 100%). Fourth, the degree to which participants' judgments were subadditive was affected by the number and strength of the alternatives retrieved from long-term memory. Fifth, the degree to which participants were subadditive was negatively correlated with WM-capacity. The results suggest that individual differences in WM-capacity are fundamental to hypothesis generation and probability judgment.

[1]  K. Klein,et al.  The reliability and stability of the turner and Engle working memory task , 1999, Behavior research methods, instruments, & computers : a journal of the Psychonomic Society, Inc.

[2]  R. Engle,et al.  Is working memory capacity task dependent , 1989 .

[3]  Jacob Cohen.  Statistical Power Analysis for the Behavioral Sciences , 1969, The SAGE Encyclopedia of Research Design.

[4]  Randall W Engle,et al.  Working memory, short-term memory, and general fluid intelligence: a latent-variable approach. , 1999, Journal of experimental psychology. General.

[5]  C. Gettys,et al.  Hypothesis plausibility and hypothesis generation , 1979 .

[6]  D. A. Kenny,et al.  The moderator-mediator variable distinction in social psychological research: conceptual, strategic, and statistical considerations. , 1986, Journal of personality and social psychology.

[7]  Frank R. Kardes,et al.  Selective hypothesis testing , 1998 .

[8]  Rick P. Thomas,et al.  Organizational Behavior and Human Decision Processes the Role of Mental Simulation in Judgments of Likelihood One Aspect of Simulation That Has Received Relatively , 2022 .

[9]  V R Neufeld,et al.  The clinical reasoning of randomly selected physicians in general medical practice. , 1982, Clinical and investigative medicine. Medecine clinique et experimentale.

[10]  Carol A. Manning,et al.  The availability explanation of excessive plausibility assessments , 1981 .

[11]  C. Gettys,et al.  MINERVA-DM: A memory processes model for judgments of likelihood. , 1999 .

[12]  R. Engle,et al.  The role of working memory capacity in retrieval. , 1997, Journal of experimental psychology. General.

[13]  Elke U. Weber,et al.  And let us not Forget Memory: The Role of Memory Processes and Techniques in the Study of Judgment and Choice , 1995 .

[14]  Andrew R. A. Conway,et al.  A controlled-attention view of working-memory capacity. , 2001, Journal of experimental psychology. General.

[15]  Derek J. Koehler,et al.  Explanation, imagination, and confidence in judgment. , 1991, Psychological bulletin.

[16]  A. Miyake,et al.  Models of Working Memory: Mechanisms of Active Maintenance and Executive Control , 1999 .

[17]  Andrew R. A. Conway,et al.  Individual differences in working memory capacity: more evidence for a general capacity theory. , 1996, Memory.

[18]  M. Dougherty,et al.  Integration of the ecological and error models of overconfidence using a multiple-trace memory model. , 2001, Journal of experimental psychology. General.

[19]  M. Young,et al.  Likelihood judgment based on previously observed outcomes: the alternative-outcomes effect in a learning paradigm , 2002, Memory & cognition.

[20]  Robert Libby,et al.  Availability And The Generation Of Hypotheses In Analytical Review , 1985 .

[21]  Craig R. Fox,et al.  Partition Priming in Judgment Under Uncertainty , 2003, Psychological science.

[22]  N. Cowan.  The magical number 4 in short-term memory: A reconsideration of mental storage capacity , 2001, Behavioral and Brain Sciences.

[23]  Derek J. Koehler,et al.  Hypothesis generation and confidence in judgment , 1994 .

[24]  A. Tversky,et al.  Support theory: A nonextensional representation of subjective probability. , 1994 .

[25]  G. Wells,et al.  The Alternative-Outcomes Effect , 1998 .

[26]  Carol A. Manning,et al.  An evaluation of human act generation performance , 1987 .

[27]  Thomas Mehle.  Hypothesis Generation in an Automobile Malfunction Inference Task. , 1982 .

[28]  E. Weber,et al.  Determinants of diagnostic hypothesis generation: effects of information, base rates, and experience. , 1993, Journal of experimental psychology. Learning, memory, and cognition.

[29]  M. Young,et al.  The Influence of Alternative Outcomes on Gut-Level Perceptions of Certainty. , 2001, Organizational behavior and human decision processes.

[30]  R. Engle,et al.  Individual differences in working memory capacity and what they tell us about controlled attention, general fluid intelligence, and functions of the prefrontal cortex. , 1999 .

[31]  Lynn Hasher,et al.  Working Memory, Comprehension, and Aging: A Review and a New View , 1988 .

[32]  P. Lachenbruch.  Statistical Power Analysis for the Behavioral Sciences (2nd ed.) , 1989 .

[33]  L. Shulman,et al.  Medical Problem Solving: An Analysis of Clinical Reasoning , 1978 .

[34]  Charles F. Gettys,et al.  Consistency Checking in Hypothesis Generation , 1983 .