Abstract
24 rats were used to investigate the effects of frequency of object change in enriched environment on problem-solving ability. Three enriched environments were used E1, E2 and E3. Each environment was equipped with a number of standard objects. Objects in E1 remained unchanged, one object was substituted once a week in E2; and one object was replaced in E3 each day. The rats were tested at 54 and again at 115 days on the Hebb-Williams maze test. Exposure after weaning to enriched environments for 26 days improved rats' problem-solving ability above that of the control group rats. However, frequency of change of objects in the enriched environments did not significantly alter problem-solving ability of these rats.
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