Table 2.
Means, standard deviations, and effect sizes for parent-report and observational measures at different assessment points or the treatment completers.
| Pre-treatment1 |
Post-treatment2 |
Three-month follow-up3 |
Main effect |
Post-hoc |
|
|---|---|---|---|---|---|
| M (SD) | M (SD) | M (SD) | F | Single group effect size d | |
| Parent-report measures | |||||
| CBCL: Externalizing Problem Scale Scoresa | 64.91 (8.99) | 55.88 (8.14) | 55.97 (10.65) | 31.26*** | d21 = 1.00, d31 = 0.99 |
| ECBI: Intensity Scale Scoresb | 139.03 (34.62) | 97.34 (27.47) | 102.50 (31.06) | 52.01*** | d21 = 1.20, d31 = 1.06 |
| ECBI: Problem Scale Scoresb | 17.41 (8.88) | 6.03 (5.93) | 5.97 (5.30) | 42.25*** | d21 = 1.28, d31 = 1.29 |
| PSI: Total Stress Scoresa | 57.75 (9.54) | 48.97 (7.00) | 48.03 (8.36) | 41.16*** | d21 = 0.92, d31 = 1.02 |
| Behavioral observation | |||||
| DPICS CLP: Do Skills | 5.25 (5.10) | 44.50 (9.77) | 43.66 (12.09) | 237.63*** | d21 = 7.70, d31 = 7.53 |
| DPICS CLP: Don't Do Skills | 33.88 (19.21) | .28 (.58) | .38 (.55) | 97.833*** | d21 = 1.75, d31 = 1.74 |
| DPICS PLP: % of CCR | 21.25 (11.79) | 95.14 (8.05) | 92.01 (10.35) | 636.363*** | d21 = 6.27, d31 = 6.00 |
| DPICS CU: % of CCR | 26.03 (19.67) | 94.18 (8.44) | 94.45 (8.29) | 301.00*** | d21 = 3.46, d31 = 3.48 |
Note. M = Mean; SD = Standard Deviation; CBCL = Child Behavior Checklist; ECBI = Eyberg Child Behavior Inventory; PSI = Parenting Stress Index; DPICS = Dyadic Parent–Child Interaction Coding System; CLP = Child-led play situation; PLP = Parent-led play situation; CU = Clean-up situation; CCR = Child compliance ratio; d = (Mpost — Mpre) / SDpre, where Mpost was the mean value at post-treatment or at follow-up, Mpre was the mean value at pre-treatment, and SDpre was the standard deviation at pre-treatment.
a
T score.
b
Raw score.
***
p < .001.