title: Shock intensity, shock duration, Sidman avoidance acquisition, and the "all or nothing" principle in rats.
mesh_terms: D000818:Animals; D001362:Avoidance Learning; D003214:Conditioning, Classical; D003216:Conditioning, Operant; D004597:Electroshock; D004924:Escape Reaction; D005260:Female; D008124:Locomotion; D009043:Motor Activity; D051381:Rats; D013045:Species Specificity