Table 2. MANOVA results per subtest over all age groups.

	Mean difference	CI 95%	F	df	p	η p 2
Cognition	-0.58	[.64,-.51]	324.22	1	< .01	.15
Receptive Communication	-0.33	[.27, .39]	120.77	1	< .01	.06
Expressive Communication	-0.25	[.19, .31]	065.80	1	< .01	.03
Fine motor	-0.82	[-1.25, .01]	357.11	1	< .01	.16
Gross motor	-1.09	[1.01, 1.17]	676.01	1	< .01	.26

Note. The Mean difference is calculated by the scaled score based on Dutch norms minus the scaled score based on US norms. Mean differences < 0 indicate that the score based on the US norms was higher than the scaled scores based on the Dutch norms. Mean differences >0 indicate that the scaled score based on the US sample is lower than the scaled score based on the Dutch sample.