What is both necessary and sufficient to maintain avoidance responding in the shuttle box?
D000818:Animals; D001362:Avoidance Learning; D003214:Conditioning, Classical; D003213:Conditioning, Psychological; D004193:Discrimination Learning; D004597:Electroshock; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D011930:Reaction Time