Effect of unavoidable shock on nonaversively motivated performance.
D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects; D004193:Discrimination Learning / Q000187:drug effects; D004597:Electroshock; D005502:Food; D008297:Male; D009042:Motivation / Q000502:physiology*; D011287:Prejudice / Q000187:drug effects; D051381:Rats