Einon D F, Morgan M J
Dev Psychobiol. 1977 Mar;10(2):123-32. doi: 10.1002/dev.420100205.
Rats housed in social isolation show heightened levels of object-contact in an open-field and are slower than socially-housed controls to emerge from a small enclosure into an unfamiliar environment. Isolation between 25 and 45 days of age produced an irreversible effect upon object contact but had no lasting effect if between 16 and 25 days or after 45 days. In contrast to object contact, emergence was affected by isolation at any age and the effect was reversed by subsequent social housing. Thus the effects of isolation upon object contact and upon emergence apparently do not depend upon a single underlying variable.
单独饲养的大鼠在旷场中表现出更高水平的物体接触，并且从一个小围栏进入陌生环境时，它们比群居对照大鼠速度更慢。25至45日龄之间的隔离对物体接触产生了不可逆的影响，但如果在16至25日龄之间或45日龄之后，则没有持久影响。与物体接触相反，在任何年龄，隔离都会影响大鼠从围栏中出来的行为，并且随后的群居饲养会逆转这种影响。因此，隔离对物体接触和大鼠从围栏中出来的行为的影响显然并不取决于单一的潜在变量。
