Sarah Gets a Weekly Allowance, but Only If All of Her

Multiple Choice

Sarah gets a weekly allowance, but only if all of her chores are completed by 5 P.M. on Friday night. Although Sarah does some work around the house during the week, most of her chores are done in a burst of activity after she comes home from school on Friday afternoon. Sarah's behavior is being maintained on a _____ schedule of reinforcement.

A) variable-ratio (VR)
B) fixed-ratio (FR)
C) variable-interval (VI)
D) fixed-interval (FI)