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Skinner box
From Wikipedia, the free encyclopedia
An operant conditioning chamber (usually Skinner box) is a laboratory apparatus used in experimental psychology to study animal behavior. The Skinner box is named after its inventor, the behaviorist B. F. Skinner, who created the device while a graduate student at Harvard University around 1930. They are used to study both classical conditioning (especially autoshaping) and operant conditioning.
The structure forming the shell of a chamber is a box large enough to easily accommodate the organism being used as a subject. (Common model organisms used include rodents—usually lab rats—pigeons, and primates).
Skinner boxes have at least one operandum (or "manipulandum") that can automatically detect the occurrence of a behavioral response or action. Typical operanda for primates and rats are response levers; if the subject presses the lever, the opposite end moves and closes a switch that is monitored by a computer or other programmed device. Typical operanda for pigeons and other birds are response keys with a switch that closes if the bird pecks at the key with sufficient force. The other minimal requirement of a conditioning chamber is that it have a means of delivering a primary reinforcer or unconditioned stimulus like food (usually pellets) or water.
With such a simple configuration, one operandum and one feeder, it is possible to investigate many psychological phenomena. Modern Skinner boxes typically have many operanda, like many response levers, two or more feeders, and a variety of devices capable of generating many stimuli, including lights, sounds, music, figures, and drawings.
Skinner boxes can also have electrified nets so that electrical charges can be given to the animals; or lights of different colors that give information about when the food is available.
Slot machines and online games are frequently cited as examples of human devices that exploit Skinner box-like techniques to randomly reward repetitive actions.
Skinner is noted to have said that he didn't want to be an eponym. The term Skinner box is considered by some to be belittling, and is probably reserved to those who are not in the discipline of the Experimental Analysis of Behavior.