Final answer:
B.F. Skinner used the procedure of shaping in his Skinner Box to reinforce behaviors that led up to the desired behavior.
Step-by-step explanation:
The procedure that B.F. Skinner used in his Skinner Box to reinforce behaviors that led up to the desired behavior is called shaping.
In shaping, successive approximations of the target behavior are rewarded, gradually moving the behavior closer to the desired outcome.
For example, if a rat inside the Skinner Box is being trained to press a lever, initially, it might accidentally touch the lever, and then get rewarded. This process is repeated, with only those behaviors that are closer to pressing the lever being rewarded.
Eventually, the rat learns to press the lever as the desired behavior.