Table 1.
Outcome | Treatment Mean (SD) |
Control Mean (SD) |
t(21) | d | p |
---|---|---|---|---|---|
Types of Change Considered | 4.45 (.69) | 4.75 (.45) | 1.23 | −.52 | .23 |
Types of Help Sought | 4.00 (1.94) | 2.58 (1.08) | 2.2 | .90 | .04 |
# of Times Help Sought | 27.05 (32.53) | 9.83 (10.95) | 1.8 1 | .73 | .09 |
# of 12-Step Meetings Attended | 9.45 (6.41) | 15.50 (13.41) | 1.531 | −.64 | .14 |
Pre-Post Change in Precontemplation | − 4.18 (2.89) | − 2.00 (4.02) | 1.91 1 | .87 | .07 |
Pre-Post Change in Contemplation | 1.18 (3.16) | .17 (3.30) | .75 | .31 | .46 |
Pre-Post Change in Action | 1.73 (3.63) | − 1.17 (3.27) | 2.01 | .84 | .06 |
Pre-Post Change in Maintenance | −1.45 (4.80) | −1.67 (3.75) | .12 | .05 | .91 |
Pre-Post Change in Readiness Score | .81 (1.18) | −.10 (1.63) | 1.50 | .64 | .15 |
Note. Analyses of changes in motivation were conducted using difference scores for brevity of presentation. An identical pattern of results was obtained with Repeated Measures Analysis of Variance. Significant and marginally significant level significant results are presented in italics.
t value and effect size estimate (Cohen’s d) are based on the comparison of square-root transformed scores for # of Times Help Sought and # of 12-Step Meetings Attended and log transformed scores for Pre-Post Change in Precontemplation due to non-normal distributions of the raw scores. Means and standard deviations of non-transformed scores are presented in the table for clarity. The mean (SD) of these transformed scores, respectively, for the treatment and control groups are 4.60 (2.75) and 2.98 (1.47) for # of Times Help Sought, 3.09 (1.00) and 3.85 (1.35) for # of 12-Step Meetings Attended, and .16 (.11) and .06 (.12) for Pre-Post Change in Precontemplation.