Bar pressing with a qualitative change in liquid reinforcement.
D000124:Achievement; D000818:Animals; D003463:Cues; D008297:Male; D011803:Quinine; D051381:Rats; D012054:Reinforcement, Psychology; D013549:Sweetening Agents; D014868:Water Deprivation
D013549:Sweetening Agents; D011803:Quinine