632 



HARRY F. HARLOW 



I I I I r 



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PROBLEMS 



Fig. 3. Oddity learning curves for 650 r monkeys and 1,000 r monkeys. 



120 160 200 



PROBLEMS 



Fig. 4. Learning set curves for 650 r monkeys and 1,000 r monkeys. 



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 PROBLEMS 



Fig. 5. Male and female monkey performance on oddity tests. 



