Khalid S R, Riopelle A J, Balasch J
J Gen Psychol. 1980 Apr;102(2d Half):241-53. doi: 10.1080/00221309.1980.9920988.
Three groups of nine juvenile rhesus monkeys (Macaca mulatta) whose mothers were maintained on diets affording 3.35, 6.70, and 13.4 percent of calories as protein during gestation were tested in a series of discrimination-learning tasks in which the critical variable was the loci of the relevant cues. The stimuli used were two 75-mm x 75-mm plastic plaques. The loci of the discriminanda (colored dots on the plaque) varied according to a 3 x 3 grid. No significant differences were found among the diet groups. A gradient of discriminability appeared that accorded with the location of the discriminanda: The stimulus region closest to the monkey made for the least and the farthest region the most difficulty of discrimination, also discriminanda on the right part of the stimulus were easier to discriminate than those on the left. Animals rewarded for displacing the plaque containing a colored dot learned the discriminations faster than those reinforced for displacing the blank plaque. The differences in salience of different parts of a stimulus plaque, though systematic, are modest, not dramatic.
将三组各九只幼年恒河猴（猕猴）用于一系列辨别学习任务的测试，这些猴子的母亲在妊娠期分别食用蛋白质热量占比为3.35%、6.70%和13.4%的饮食。在这些任务中，关键变量是相关线索的位置。所使用的刺激物是两块75毫米×75毫米的塑料板。辨别物（板上的彩色圆点）的位置根据一个3×3的网格变化。在不同饮食组之间未发现显著差异。出现了一种与辨别物位置相符的可辨别性梯度：最靠近猴子的刺激区域最难辨别，而最远的区域最容易辨别，同样，刺激物右侧部分的辨别物比左侧的更容易辨别。因移动含有彩色圆点的板而得到奖励的动物比因移动空白板而得到强化的动物学习辨别更快。刺激板不同部分的显著性差异虽然具有系统性，但并不显著，并不突出。
