Abstract
Three groups of rats were reared from day 25 to day 65 in either (1) a large free environment cage containing manipulanda, (2) individual restricted environment cages that afforded little sensory or locomotor experience, or (3) in normal cages. Ss were given a brief home cage emergence test designed to evoke “free” exploration. “Forced” exploration was observed by placing each animal in a large cage containing a variety of small objects. FE animals exhibited more exploratory activity in the home cage emergence test but less object exploration in the forced environment.
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