Table 1.
Demographic and study variables by child DAT1 genotype
| Child DAT1 genotype |
|||||||
|---|---|---|---|---|---|---|---|
|
DAT1 10/10 (n = 177) |
DAT1 9/9 and 9/10 (n = 188) |
d |
|||||
| Variable | M | SD | n | M | SD | n | |
| Child sex, male* | 85 (48%) |
112 (60%) |
|||||
| PPVT | 102.58 | 13.08 | 103.52 | 13.80 | .07 | ||
| SES | 43.77 | 10.13 | 44.88 | 11.23 | .10 | ||
| PCI support | 4.36 | 0.56 | 4.27 | 0.59 | .16 | ||
| PCI guidance* | 4.23 | 0.57 | 4.08 | 0.50 | .28 | ||
| PCI hostility* | 1.08 | 0.23 | 1.14 | 0.31 | .22 | ||
| PCI intrusiveness | 1.62 | 0.73 | 1.59 | 0.68 | .04 | ||
| PCI child PA | 2.82 | 0.62 | 2.79 | 0.72 | .04 | ||
| PCI child NA toward parent* |
1.21 | 0.40 | 1.30 | 0.47 | .21 | ||
DAT1, dopamine transporter gene; NA, negative affect; PA, positive affect; PCI, parent-child interaction task; PPVT, Peabody Picture Vocabulary Test; SD, standard deviation; SES, socioeconomic status, as indexed by Hollingshead Four Factor Index of Social Status (Hollingshead, 1975).
*
p ≤ .05.