Other questions in this quiz

2. 147 participants had...

  • reduced their cocaine use
  • doubled their cocaine use

3. What was the percentage of participants who obtained income from illegal sources at the beginning, then at the end of the study?

  • 82% to 16%
  • 56% to 12%
  • 63% to 10%
  • 40% to 5%

4. 106 participants had...

  • stopped using cocaine by the end of the study
  • increased their heroin intake by the end of the study

5. What was one of the behavioural rules?

  • Do not sell the prescribed drugs
  • Take daily urine tests
  • Do not drink any alcohol

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