Emerson V F
Exp Brain Res. 1980;38(1):43-52. doi: 10.1007/BF00237929.
Twelve golden hamsters learned visual discriminations in a Y-maze for a food reward. After initial training on a light/dark task, the hamsters learned to discriminate a grating from a uniform grey field of the same mean luminance as the grating; grating orientation was varied among hamsters. Those animals trained with the grating vertical or horizontal learned significantly faster than those trained on obliques. Acuity, measured by varying the spatial frequency of the grating according to the descending method of limits or the method of constant stimuli, was determined to be about 0.7 c/deg at 50% correct or 0.5 c/deg at 70% correct for all orientations tested (0 degrees, 45 degrees, 90 degrees, 135 degrees). Acuity was relatively constant within the human photopic range, but decreased to about 0.35 c/deg at 5 x 10(-4)cd/m2. The change in acuity as a function of luminance suggests that the hamster has a rod-dominated retina.
12只金黄地鼠在Y型迷宫中通过视觉辨别来获取食物奖励。在最初进行明暗任务训练后，地鼠学会了区分光栅与平均亮度与光栅相同的均匀灰色区域；不同地鼠的光栅方向不同。那些接受垂直或水平光栅训练的动物比接受倾斜光栅训练的动物学习速度明显更快。根据极限递减法或恒定刺激法改变光栅的空间频率来测量视敏度，结果表明，在所有测试方向（0度、45度、90度、135度）下，50%正确时视敏度约为0.7周/度，70%正确时视敏度约为0.5周/度。在人类明视觉范围内，视敏度相对恒定，但在5×10⁻⁴cd/m²时降至约0.35周/度。视敏度随亮度的变化表明地鼠的视网膜以视杆细胞为主。
