Marco Is Training His Dog to Sit

Multiple Choice

Marco is training his dog to sit. Initially, he gives the dog a biscuit each time the dog sits on command. Later, he gives the dog a biscuit every fourth time the dog sits on command. Marco has replaced a(n) _____ schedule of reinforcement with a(n) _____ schedule.

A) continuous; fixed-interval
B) continuous; fixed-ratio
C) primary; secondary
D) continuous; secondary