Murphy Matthew S, Brooks Daniel I, Cook Robert G
Department of Psychology, Salem State University.
Department of Psychology.
J Exp Psychol Anim Learn Cogn. 2015 Jul;41(3):277-85. doi: 10.1037/xan0000055. Epub 2015 Apr 27.
The ability of animals to visually memorize and categorize a large number of pictures is well established. Determining the kinds of information animals use to accomplish these goals has been more difficult. This experiment examined the contribution of spatial frequency information to picture memorization by pigeons. A series of grayscale pictures were notch-filtered to eliminate different portions of the spatial frequency spectrum of memorized pictures. The results indicated that the higher spatial frequencies in the pictures were most important to accurate recognition, suggesting that the detection of fine detail at the high range of pigeon visual acuity was a critical component to their memorized representations. Subsequent tests with band-pass and hybrid conflict stimuli confirmed this conclusion. It is suggested that cognitive and task demands may determine how spatial frequency is used by pigeons, with higher frequencies more important to item memorization, while lower spatial frequencies may contribute to categorization in other types of discrimination tasks.
动物在视觉上记忆和分类大量图片的能力已得到充分证实。确定动物用于实现这些目标的信息种类则更加困难。本实验研究了空间频率信息对鸽子图片记忆的贡献。一系列灰度图片经过带 notch 滤波器处理，以消除记忆图片空间频率谱的不同部分。结果表明，图片中较高的空间频率对准确识别最为重要，这表明在鸽子视觉敏锐度的高范围内检测精细细节是其记忆表征的关键组成部分。随后使用带通和混合冲突刺激进行的测试证实了这一结论。研究表明，认知和任务需求可能决定鸽子如何使用空间频率，较高频率对项目记忆更重要，而较低空间频率可能有助于其他类型辨别任务中的分类。
