Learning in the rat: effect of early experience with an unsolvable problem.
D000367:Age Factors; D000818:Animals; D003463:Cues; D004193:Discrimination Learning; D004777:Environment; D005260:Female; D005793:Generalization, Psychological; D006799:Housing, Animal; D009949:Orientation; D011340:Problem Solving; D012718:Set, Psychology; D014796:Visual Perception