If he did not earn all his free time, he was brought into the house when his earned time ended and not allowed to enjoy leisure time activities for the balance of the day. ... The parents were contacted personally once a week to answer their questions and review ... The experiment continued for the older boys until near the end of the school year. ... Shirley (see Figure 1) was a 10th grade EMR student. ... During reinforcement conditions she averaged 92% of her daily assignmentsanbsp;...