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. Author manuscript; available in PMC: 2015 Sep 29.
Published in final edited form as: Psychol Addict Behav. 2015 May 4;29(3):501–511. doi: 10.1037/adb0000078

Figure 4.

Figure 4

MPS, Self-efficacy, and Coping mean scores from piecewise analysis. MPS = Marijuana Problem Scale; ETX = end of treatment.

a: BRIEF vs. THERAPIST mean difference is significant (MPS 3M: t(173)=−2.82, p=0.005)

b: BRIEF vs. COMPUTER mean difference is significant (MPS 3M: t(173)=−2.13, p=0.03; Self-efficacy 3M: t(1.72)=2.03, p=0.04)