The effect of heterogeneity on numerical ordering in rhesus monkeys
The effect of heterogeneity on numerical ordering in rhesus monkeys
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DOI：
10.1207/s15327078in0902_5
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发表时间：
2006-01-01
期刊：
影响因子：
2.6
通讯作者：
Brannon, Elizabeth A.
中科院分区：
文献类型：
--
作者：
Cantlon, Jessica F.;Brannon, Elizabeth A.
我们研究了刺激内异质性如何影响恒河猴对数字1到9的排序能力。两只恒河猴在触摸屏任务中进行测试，其中每个视觉阵列中的元素可变性通过允许元素在颜色，大小，形状或这些维度的任何组合中变化而系统地变化。我们没有发现证据表明，当猴子接受不同颜色、大小或形状的刺激时，在准确性或反应时间上有成本（或收益）。即使两只猴子都经历了在颜色、形状和大小上都相同的数组的长期初始训练，情况也是如此。这一发现对猴子用来表示和比较数字的机制的影响进行了讨论。
We investigated how within-stimulus heterogeneity affects the ability of rhesus monkeys to order pairs of the numerosities 1 through 9. Two rhesus monkeys were tested in a touch screen task where the variability of elements within each visual array was systematically varied by allowing elements to vary in color, size, shape, or any combination of these dimensions. We found no evidence of a cost (or benefit) in accuracy or reaction time when monkeys were tested with stimuli that were heterogeneous in color, size, or shape. This was true even though both monkeys experienced extended initial training with arrays that were homogeneous in the color, shape, and size of elements. The implications of this finding for the mechanisms that monkeys use to represent and compare numerosities are discussed.