Table 1
Schedule of reinforcement
Week
Breath test
Payment
1
1
US$15
2
US$20
3
US$25
2
4
US$30
5
US$35
6
US$40
3
7
US$45
8
US$50
9
US$55
4
10
US$55
11
US$55
12
US$55
5
13
US$55
14
US$55
15
US$55