Making Consent More Informed: Preliminary Results From a Multiple-Choice Test Among Probation-Referred Marijuana Users Entering a Randomized Clinical Trial

Article Figures & Data

Table 1

Informed-Consent Quiz: Item Response Frequencies

Variable	n	%
1. How many therapy sessions will you be asked to attend if you decide to participate?
a. 4 Sessions	2	1.5
b. 0 Sessions	0
c. 8 Sessions^*	127	97.7
d. None of the above	1	0.8
2. Which of the following best describes the requirements for participation in the study?
a. I can choose to participate in the study, and I can dropout at any time.^*	106	81.5
b. I can choose to participate but have to stay in the study.	7	5.4
c. I have to participate because of probation.	8	6.2
d. None of the above	9	6.9
3. Which of the following are treatment types that you may receive according to the luck of the draw?
a. Drug counseling (standard treatment at the clinic)	1	0.7
b. Motivational interviewing	0
c. Drug counseling and rewards for attending sessions and providing marijuana-free urine samples	32	24.6
d. Any of the above^*	97	74.6
4. Whom can you contact if you have any questions about the study?
a. Kathleen Carroll, Ph.D.	11	8.5
b. Rajita Sinha, Ph.D.	2	1.5
c. Caroline Easton, Ph.D.	6	4.6
d. Any of the above^*	111	85.4

n = 130, Range of weeks in treatment is 0 to 8. Range of quiz questions is 1 to 4.
* Correct response.

Table 2

Relationships Between Informed-Consent Quiz Scores and Treatment Outcome Indicators

Variable	Total Quiz Score	Voluntary Nature of Participation Item
Weeks in treatment	0.06	0.01
Days of marijuana use during treatment	−0.19^*	−0.24^*
Percent marijuana positive urine specimens submitted	−0.14	−0.19^*
Longest continuous period of abstinence from marijuana, urine confirmed	−0.22^**	−0.25^**