Jones Sarah M, Pearson John, DeWind Nicholas K, Paulsen David, Tenekedjieva Ana-Maria, Brannon Elizabeth M
Department of Psychology and Neuroscience, Duke University, Durham, NC, USA,
Anim Cogn. 2014 May;17(3):503-15. doi: 10.1007/s10071-013-0682-3. Epub 2013 Sep 26.
We investigated the precision of the approximate number system (ANS) in three lemur species (Lemur catta, Eulemur mongoz, and Eulemur macaco flavifrons), one Old World monkey species (Macaca mulatta) and humans (Homo sapiens). In Experiment 1, four individuals of each nonhuman primate species were trained to select the numerically larger of two visual arrays on a touchscreen. We estimated numerical acuity by modeling Weber fractions (w) and found quantitatively equivalent performance among all four nonhuman primate species. In Experiment 2, we tested adult humans in a similar procedure, and they outperformed the four nonhuman species but showed qualitatively similar performance. These results indicate that the ANS is conserved over the primate order.
我们研究了三种狐猴（环尾狐猴、蒙氏鼬狐猴和黄头鼬狐猴）、一种旧世界猴（恒河猴）以及人类的近似数系统（ANS）的精度。在实验1中，对每个非人类灵长类物种的四只个体进行训练，使其在触摸屏上选择两个视觉阵列中数字较大的那个。我们通过对韦伯分数（w）进行建模来估计数字敏锐度，发现所有四种非人类灵长类物种在数量上表现相当。在实验2中，我们用类似的程序测试了成年人类，他们的表现优于这四种非人类物种，但在质量上表现出相似的性能。这些结果表明，近似数系统在灵长目动物中是保守的。
