Rearing variations and Hebb-Wiliams maze performance.
D000818:Animals; D001835:Body Weight; D004644:Emotions; D004777:Environment; D005508:Food Deprivation; D007858:Learning; D008297:Male; D009042:Motivation; D011340:Problem Solving; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors