Trial spacing and emotionality in the rat.
D000654:Amobarbital / Q000494:pharmacology; D000818:Animals; D004644:Emotions; D005108:Extinction, Psychological / Q000187:drug effects; D005639:Frustration; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D012054:Reinforcement, Psychology; D012201:Reward; D013997:Time Factors
D000654:Amobarbital