THE VISUAL-ACUITY FOR THE LATERAL VISUAL-FIELD OF THE PIGEON (COLUMBA-LIVIA)
THE VISUAL-ACUITY FOR THE LATERAL VISUAL-FIELD OF THE PIGEON (COLUMBA-LIVIA)
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DOI：
10.1016/0042-6989(93)90031-q
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发表时间：
1993-08-01
期刊：
影响因子：
1.8
通讯作者：
GUNTURKUN, O
中科院分区：
文献类型：
--
作者：
HAHMANN, U;GUNTURKUN, O
以往对鸽子的研究表明，鸽子正面视野的视觉敏锐度远高于侧面视野。怀疑侧面视场的差值是由于测试条件不理想，我们用高对比度方波光栅确定了8只头部固定的鸽子的侧面视场敏锐度。采用以水为强化剂，下颌骨为操作项的工具性条件反射任务。受试者的平均视力值为12.6 c/度。结果表明，侧视野的敏锐度仅略低于正面视野。这些数据为生态学观察提供了心理物理基础，即鸽子和大多数其他鸟类在仔细观察小的和远处的物体时是横向凝视的。
Previous studies on pigeons indicated that the visual acuity for the frontal visual field was much higher than that for the lateral one. Suspecting that the poor values for the lateral field were due to suboptimal testing conditions, we determined the lateral field acuity in eight head-fixed pigeons with high-contrast square-wave gratings. An instrumental conditioning task with water as reinforcer and mandibulation as an operant was used. Subjects achieved a mean acuity value of 12.6 c/deg. The results show that the acuity of the lateral visual field is only slightly lower than that of the frontal field. These data provide a psychophysical basis for ecological observations that pigeons and most other birds gaze laterally when scrutinizing small and distant objects.