Answer:
Escape training/conditioning.
Explanation:
The Skinner box or operant conditioning chamber is a laboratory system created to study animal behavior by American psychologist B. F. Skinner (March 20, 1904 – August 18, 1990).
It has a mechanism that conditions animal behaviour by subsequent introduction of reward or punishment. In this example, the rat is conditioned or in other wards is trained to escape punishment in the form of the electric shock by pressing the bar.