Variable | Min | Max | M | SD | |
---|---|---|---|---|---|
Gender (% boys/girls) (N = 1181) | 52.3/47.7 | ||||
Age in years (N = 1181) | 3.1 | 3.9 | 3.5 | 0.1 | |
Mothers’ edu. (in years) (N = 1132) | 9 | 18 | 15.2 | 2.4 | |
Fathers’ edu. (in years) (N = 1087) | 9 | 18 | 14.5 | 2.6 | |
Mothers’ age (N = 1180) | 19 | 43 | 30.6 | 4.3 | |
ADHD symptoms (N = 1181) | 0 | 18 | 4.0 | 3.9 | |
ODD symptoms (N = 1181) | 0 | 8 | 1.4 | 1.5 | |
IQ (N = 1181) | 67 | 130 | 101.9 | 9.2 | |
Verbal ability (N = 1181) | 2 | 17 | 9.7 | 2.1 | |
Nonverbal ability (N = 1181) | 4 | 18 | 10.9 | 2.0 | |
VWM (N = 1125) | 2 | 16 | 10.8 | 2.9 | |
NVWM (N = 1174) | 2 | 17 | 10.4 | 2.8 | |
Response inhibition (N = 1031) | 0 | 30 | 14.7 | 8.4 | |
Reported expr. language (N = 1067) | 8 | 50 | 41.6 | 7.3 |