期刊
JOURNAL OF EXPERIMENTAL PSYCHOLOGY-ANIMAL BEHAVIORAL PROCESSES
卷 33, 期 1, 页码 42-54出版社
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0097-7403.33.1.42
关键词
numerical cognition; enumeration; monkeys; Macaca mulatta
类别
-
资金
- NICHD NIH HHS [HD-38051] Funding Source: Medline
Two rhesus monkeys selected the larger of two sequentially presented sets of items on a computer monitor. In Experiment 1, performance was related to the ratio of set sizes, and the monkeys discriminated between sets with up to 10 items. Performance was not disrupted when 1 set had fewer than 4 items and I set had more than 4 items, a critical trial type for differentiating object file and analog models of numerical representation. Experiment 2 controlled the interitem rate of presentation. Experiment 3 included some trials on which number and amount (visual surface area) offered conflicting cues. Experiment 4 varied the total duration of set presentation and the duration of item visibility. In all of the experiments, performance remained high, although total set presentation duration also acted as a partial cue for the monkeys. Overall, the data indicated that rhesus monkeys estimate the approximate number of items in sequentially presented sets and that they are not relying solely on nonnumerical cues such as rate, duration, or cumulative amount.
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