Table 1. Means and standard deviations for participant characteristics.
| M | SD | |
|---|---|---|
| Age in years | 8.00 | 1.70 |
| Estimated Full Scale IQa | 95.51 | 12.35 |
| DSM 5 items endorsed by parents or teachersb | ||
| Inattention | 8.32 | 1.105 |
| Hyperactivity/impulsivity | 7.41 | 2.04 |
| Oppositional/defiant | 4.68 | 2.84 |
| Conduct disorder | 1.12 | 1.71 |
| IOWA Conners Parent Rating Scale Inattention/Overactivityc | 10.70 | 3.10 |
| IOWA Conners Parent Rating Scale Oppositional/Defiantc | 7.36 | 3.90 |
| IOWA Conners Teacher Rating Scale Inattention/Overactivityc | 10.21 | 3.18 |
| IOWA Conners Teacher Rating Scale Oppositional/Defiantc | 6.06 | 4.68 |
| Parent age | 39.62 | 6.81 |
| Parent marital status (% single)d | 51.9% |
Note.
a
Full Scale IQ was estimated from the Wechsler Abbreviated Scale of Intelligence- Second Edition. For children younger than 6 years old at intake, the Block Design and Vocabulary subscales from the Wechsler Preschool and Primary Scale of Intelligence - Fourth Edition.
b
A symptom was considered present if either the teacher or parent rated it as clinically significant (endorsed as ‘pretty much’ or ‘very much’) on the Disruptive Behavior Disorders Rating Scale (Pelham, Gnagy, Greenslade, and Milich, 1992) or on the Diagnostic Interview Schedule for Children (DISC-IV; 1998).
d
Single includes primary caregivers who were never married, divorced, and separated and does not include those who were married or living with a partner.