Kalat J W
Dev Psychobiol. 1975 Sep;8(5):383-7. doi: 10.1002/dev.420080502.
Infant guinea pigs were hand-fed a 10% sucrose solution and poisoned after delays of 0 min, 30 min, or 24+ hr. Subjects in the first 2 groups showed significant sucrose aversions when tested more than a month later. No significant difference existed between the 0- and 30-min groups; no deficiency in this type of learning was evident even in neonates. All 3 groups showed a lower sucrose preference if first exposed at ages 0-6 days than at 7-11 days. Evidently exposure to sucrose at the earlier ages was less effective in reducing later neophobia to sucrose; although the youngest animals had no evident deficiency in learning aversions, they may have been deficient in learning "safety".
给幼龄豚鼠人工喂食10%的蔗糖溶液，并在延迟0分钟、30分钟或24小时以上后进行中毒处理。前两组的实验对象在一个多月后接受测试时表现出明显的蔗糖厌恶。0分钟组和30分钟组之间没有显著差异；即使是新生儿，这种类型的学习也没有明显缺陷。如果在0 - 6日龄首次接触蔗糖，所有三组的蔗糖偏好都比在7 - 11日龄时更低。显然，在较早年龄接触蔗糖在降低后期对蔗糖的新恐惧症方面效果较差；尽管最年幼的动物在学习厌恶方面没有明显缺陷，但它们在学习“安全性”方面可能存在缺陷。
