Table 5. Hierarchical Multiple Regressions of CBCL, TRF and DOF Scales Predicting Parent and Teacher Reports of Hyperactivity-Impulsivity.
| Parent-rated Hyperactivity-Impulsivitya | Teacher-rated Hyperactivity-Impulsivityb | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Predictors | B | R2 | ΔR2 | Adj.R2 | Semi-partial r2 | B | R2 | ΔR2 | Adj.R2 | Semi-partial r2 |
| Model 2a | ||||||||||
| Step 1 | .46*** | .45 | .54 | .53 | ||||||
| CBCL Attention Problems | .62*** | .34 | .01 | .00 | ||||||
| TRF Attention Problems | .15** | .02 | .73*** | .48 | ||||||
| Step 2 | .46*** | .00 | .45 | .54 | .00 | .53 | ||||
| CBCL Attention Problems | .62*** | .34 | .01 | .00 | ||||||
| TRF Attention Problems | .14** | .02 | .72*** | .46 | ||||||
| DOF Attention Problems | .03 | .00 | .04 | .00 | ||||||
| Model 2b | ||||||||||
| Step 1 | .46*** | .45 | .54*** | .53 | ||||||
| CBCL Attention Problems | .62*** | .34 | .01 | .00 | ||||||
| TRF Attention Problems | .15** | .02 | .73*** | .48 | ||||||
| Step 2 | .46** | .01 | .46 | .55*** | .02** | .55 | ||||
| CBCL Attention Problems | .62*** | .34 | .02 | .00 | ||||||
| TRF Attention Problems | .12*c | .01 | .69*** | .38 | ||||||
| DOF Oppositional | .08d | .01 | .13** | .02 | ||||||
| Model 2c | ||||||||||
| Step 1 | .46*** | .45 | .54*** | .53 | ||||||
| CBCL Attention Problems | .62*** | .34 | .01 | .00 | ||||||
| TRF Attention Problems | .15** | .02 | .73*** | .48 | ||||||
| Step 2 | .47*** | .02** | .47 | .60*** | .06*** | .59 | ||||
| CBCL Attention Problems | .61*** | .34 | .01 | .00 | ||||||
| TRF Attention Problems | .12** | .01 | .68*** | .40 | ||||||
| DOF Intrusive | .13** | .02 | .25*** | .06 | ||||||
| Model 2d | ||||||||||
| Step 1 | .63*** | .63 | .71*** | .71 | ||||||
| CBCL Attention Deficit/Hyperactivity Problems | .74*** | .47 | .06 | .00 | ||||||
| TRF Attention Deficit/Hyperactivity Problems | .13** | .01 | .82*** | .58 | ||||||
| Step 2 | .63*** | .00 | .63 | .72*** | .01* | .72 | ||||
| CBCL Attention Deficit/Hyperactivity Problems | .74*** | .47 | .06 | .00 | ||||||
| TRF Attention Deficit/Hyperactivity Problems | .13** | .01 | .80*** | .50 | ||||||
| DOF Attention Deficit/Hyperactivity Problems | .00 | .00 | .07* c, e | .00 | ||||||
Note: N = 310. B = Standardized Beta weights; Adj. R2 = Adjusted R2; Semi-partial r2 = unique variance accounted for by each predictor. CBCL = Child Behavior Checklist; TRF = Teacher's Report Form; DOF = Direct Observation Form.
a
From Attention Deficit/Hyperactivity Disorder Rating Scale-IV-Home version.
b
From Attention Deficit/Hyperactivity Disorder Rating Scale-IV-School version
c
Possible chance effect when corrected for number of analyses (Sakoda, Cohen & Beall, 1954).
d
With removal of two outliers, Beta = .09, p = .039.
e
With removal of one outlier, Beta = .05, p = .104.
*
p <.05.
**
p <.01.
***
p <.001.