Journal
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL BEHAVIORAL PROCESSES
Volume 32, Issue 2, Pages 111-119Publisher
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0097-7403.32.2.111
Keywords
uncertainty monitoring; metacognition; numerosity; monkeys; Macaca mulatta
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Funding
- NICHD NIH HHS [HD-38051] Funding Source: Medline
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Two rhesus macaques (Macaca mulatta) judged arrays of dots on a computer screen as having more or fewer dots than a center value that was never presented in trials. After learning a center value, monkeys were given an uncertainty response that let them decline to make the numerosity judgment on that trial, Across center values (3-7). errors occurred most often for sets adjacent in numerosity to the center value. The monkeys also used the uncertainty response most frequently oil these difficult trials. A 2nd experiment showed that monkeys' responses reflected numerical magnitude and not the surface-area illumination of the displays. This research shows that monkeys' uncertainty-monitoring capacity extends to the domain of numerical cognition. It also shows monkeys' use of the purest uncertainty response possible, uncontaminated by any secondary motivator.
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