Jackson, a Dog, Has Learned That When He Wants to Go

Multiple Choice

Jackson, a dog, has learned that when he wants to go and chase birds in the backyard, he has to stand in front of the back-porch door until his owner lets him out. Recently, Jackson's owner, Ismael, added an inner door to gain access to the back porch. Jackson must now push the inner door open, to be reinforced by the chance to stand at the back door, where his owner will open the door and let him out to chase birds. This behavioural process is called ____________.

A) behavioural modification
B) successive approximations
C) shaping
D) chaining