Table 6.

Multiple regression models for the backward Digit Span task, backward Dot Matrix task, Sky Search task, and the positive flanker effect.

	Backward Digit Span		Backward Dot Matrix		Sky Search		Positive flanker effect
	β	p	β	p	β	p	β	p
Age	0.35	<0.001	0.38	<0.001	-0.35	<0.001	-0.27	0.001
NVIQ	0.25	0.001	0.27	<0.001	-0.10	0.16	-0.14	0.11
SES	0.03	0.72	0.04	0.61	0.12	0.11	-0.03	0.70
PPVT	0.15	0.05	0.18	0.02	-0.20	0.01	-0.23	0.01
Group	-0.06	0.45	0.03	0.66	-0.19	0.01	-0.05	0.55
	Adjusted R2 = 0.17∗∗∗		Adjusted R2 = 0.21∗∗∗		Adjusted R2 = 0.15∗∗∗		Adjusted R2 = 0.11∗∗∗

NVIQ, standardized non-verbal intelligence score; SES, socioeconomic status; PPVT, Peabody Picture Vocabulary Test (Dutch receptive vocabulary, standardized score); ^∗∗∗p < 0.001.