van den Berg, R and Vogel, M and Josic, K and Ma, WJ (2012) Optimal inference of sameness. Proc Natl Acad Sci U S A, 109. pp. 3178-3183.Full text not available from this repository.
Deciding whether a set of objects are the same or different is a cornerstone of perception and cognition. Surprisingly, no principled quantitative model of sameness judgment exists. We tested whether human sameness judgment under sensory noise can be modeled as a form of probabilistically optimal inference. An optimal observer would compare the reliability-weighted variance of the sensory measurements with a set size-dependent criterion. We conducted two experiments, in which we varied set size and individual stimulus reliabilities. We found that the optimal-observer model accurately describes human behavior, outperforms plausible alternatives in a rigorous model comparison, and accounts for three key findings in the animal cognition literature. Our results provide a normative footing for the study of sameness judgment and indicate that the notion of perception as near-optimal inference extends to abstract relations.
|Additional Information:||PMCID: PMC3286990|
|Uncontrolled Keywords:||Animals Cognition Humans Judgment Models, Biological Perception Psychometrics|
|Divisions:||Div F > Computational and Biological Learning|
|Depositing User:||Cron Job|
|Date Deposited:||23 Mar 2013 15:10|
|Last Modified:||13 Jan 2014 01:21|
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