Hemispheric differences in the recognition of partly occluded objects by newly hatched domestic chicks (Gallus gallus)
Hemispheric differences in the recognition of partly occluded objects by newly hatched domestic chicks (Gallus gallus)
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DOI：
10.1007/s10071-004-0208-0
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发表时间：
2004-02
期刊：
影响因子：
2.7
通讯作者：
L. Regolin;Fabio Marconato;G. Vallortigara
中科院分区：
文献类型：
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作者：
L. Regolin;Fabio Marconato;G. Vallortigara
家养小鸡能够将部分被遮挡物掩盖的物体作为一个整体来感知（“非模态完成”）。在以前的研究中，小鸡被印在一个特定的配置上，在测试中，他们被要求在两个可选的版本中进行选择。使用相同的范式，我们现在通过测试一只眼睛暂时被遮盖的新生小鸡来研究非模态完成中半球差异的存在。不同的新孵出的小鸡被印在双眼上：（1）在一个被叠加的条部分遮挡的正方形上，（2）在一个整体上，或者（3）在一个被截断的正方形上。在测试中，在单眼条件下，每只小鸡都可以在完整的正方形和截肢的正方形之间自由选择。在关键条件1中，只使用左眼的小鸡选择了完整的正方形（就像双眼小鸡一样）;相反，右眼小鸡倾向于选择被切断的正方形。在另一组小鸡中也得到了类似的结果，这些小鸡被双眼印在一个十字架上（在十字架的中央部分被封闭或被截肢），并被要求在一个完整的十字架或被截肢的十字架之间做出选择。左眼和双眼小鸡选择了完整的十字架，而右眼小鸡没有选择截肢十字架显着更频繁。这些发现表明，由左眼（主要位于右半球）喂养的神经结构，在小鸡，更倾向于“全球”的视觉场景分析，而右眼喂养的似乎更倾向于“特征”的视觉场景分析。
Domestic chicks are capable of perceiving as a whole objects partly concealed by occluders (“amodal completion”). In previous studies chicks were imprinted on a certain configuration and at test they were required to choose between two alternative versions of it. Using the same paradigm we now investigated the presence of hemispheric differences in amodal completion by testing newborn chicks with one eye temporarily patched. Separate groups of newly hatched chicks were imprinted binocularly: (1) on a square partly occluded by a superimposed bar, (2) on a whole or (3) on an amputated version of the square. At test, in monocular conditions, each chick was presented with a free choice between a complete and an amputated square. In the crucial condition 1, chicks tested with only their left eye in use chose the complete square (like binocular chicks would do); right-eyed chicks, in contrast, tended to choose the amputated square. Similar results were obtained in another group of chicks imprinted binocularly onto a cross (either occluded or amputated in its central part) and required to choose between a complete or an amputated cross. Left-eyed and binocular chicks chose the complete cross, whereas right-eyed chicks did not choose the amputated cross significantly more often. These findings suggest that neural structures fed by the left eye (mainly located in the right hemisphere) are, in the chick, more inclined to a “global” analysis of visual scenes, whereas those fed by the right eye seem to be more inclined to a “featural” analysis of visual scenes.