Table 4.

Hypothesis III: Regional GM intensity and volume changes.

	Measurement	Nationality	Age	Nationality × Age
Figures 6A,B	Frontal GM		F(4) = 9.39***
			Overall decrease as age
Figures 6C,D	Temporal GM	F(1) = 68.72***		F(4) = 4.07*
		CN > US		CN increased from childhood to 12 followed by a plateau; US increased and peaked at around 14
Figures 7A,B	Occipital GM		F(4) = 3.34*
			Show decrease from 10 to 14 for CN and US, but no clear patterns.
Figures 7C,D	Pariatal GM	F(1) = 24.88***
		CN > US

Significant level:

^*p < 0.05;

^**p < 0.01;

^***p < 0.001;

empty cell refers to non-significant results.