What is a Skinner box?

B.F. Skinner was a behavioral psychologist who studied "Operant conditioning," which is a type of associative learning in which there is a contingency between the response and the presentation of the reinforcer. The classic Skinner experiment, where he trained rats and pigeons in a box to press a lever in order to obtain a food reward was the basis of his research.

Note: Original answer claimed Skinner used his daughter in experiments which is pure slander; the 'air crib' he designed was purely to make the archaic barred crib more ergonomic and comfortable for the child.