|Negative urine specimens earn points that are worth approximately $0.25 each.
During weeks 1-12 of treatment:
The first negative specimen is worth 10 points or $2.50 ($0.25 x 10 points)
- For each subsequent, consecutive negative urine specimen, the value of the voucher increases by 5 points (e.g. second = 15 points or $3.75, third = 20 or $5.00, etc.)
- The equivalent of a $10 bonus is earned for three consecutive negative urines in a week.
- Positive specimens or failure to submit a specimen on schedule resets the value of vouchers back to the initial $2.50
- Five consecutive negative specimens after submission of a positive speciment returns the value of vouchers to their level prior to the reset
During weeks 13-24, the magnitude of the reinforcer is reduced to one state lottery ticket for each cocaine-negative specimen.