Operant conditioning chamber ("Skinner Box") with two feeding hoppers, used in psychological experiments on learning in the rat, used at the Department of Psychology, University of Liverpool. Campden ...

From Skinner’s accounts of such experiments, we gained the concept of “positive reinforcement” of behaviour. The hero of Rat City, John B ­Calhoun, was an American scientist who thought ...

Eighty rats were placed in Skinner boxes (the glass-walled enclosures, developed by psychologist B. F. Skinner, widely used in behavioral experiments with animals) and trained to press a green ...