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. Author manuscript; available in PMC: 2014 Oct 8.
Published in final edited form as: J Couns Psychol. 2013 Mar 18;60(2):180–187. doi: 10.1037/a0032178

TABLE 2.

Outcome Data for Participants in the Treatment and Control Groups.

Study Condition
Control Treatment
Variable Mean (SD) n Mean (SD) n z p d
Intake lapse 5.88 (0.95) 24 3.19 (0.34) 46 2.44 .02 −4.05
Sessions Attended 8.34 (9.89) 29 12.24 (10.18) 45 1.71 .09 2.39
Probation Violations 3.24 (0.76) 34 3.13 (0.56) 48 0.37 .71 −0.14
% n % n χ 2 df p d

BIP Compliant 50.0 32 72.9 48 4.36 1 .04 0.47
Intake 83.9 31 97.9 48 5.30 1 .03 0.50
Session 6 48.3 29 73.3 45 4.78 1 .03 0.52
Session 13 31.0 29 44.4 45 1.33 1 .25 0.27
Session 20 17.2 29 24.4 45 0.54 1 .46 0.17
Session 26 13.8 29 15.6 45 0.04 1 .84 <0.01
Recidivated 39.4 33 25.0 48 1.90 1 .17 −0.31