美国著名的动物行为学家哈洛博士在研究恒河猴的社交行为时发现如下事实:成年恒河猴的社交行为受其早期的社交生活经验的影响很大。新生猴头两年如被完全隔离于猴群之外,则其后行为极不正常,而且不能矫正。如果出生后只隔离八十天或不到八十天,则对其以后的行为无严重影响。隔离六个月,则其情况介乎前两种情况之间。研究表明,新生猴和母猴或其它小猴的交往是完全必要的。 Harlow, a famous animal behaviorologist in the United States, studied the social behavior of rhesus monkeys and found the following facts: The social behavior of adult rhesus monkeys is greatly influenced by their early experience of social life. If the new born monkey is completely isolated from the monkey two years later, then the behavior is extremely abnormal, and can not be corrected. If separated only 80 days or less than 80 days after birth, no serious impact on their subsequent behavior. In isolation for six months, the situation is between the first two cases. Research shows that newborn monkeys and other monkeys or other monkey interaction is absolutely necessary.