Table 1.

Predicted versus observed data.

	Accelerated	Delayed	Observed
	Cortical Measures
Infancy, toddlerhood	Higher1,2,3	Lower 1,2,3	Lower3
	Earlier peak1	Later peak1	Slower change3
	Faster change1,2,3	Slower change 1,2,3
Childhood, adolescence	Lower 1,2,3	Higher1,2,3	Lower1,2,3
	Earlier peak2,3	Later peak2,3	Slower change1,2,3
	Faster change1,2,3	Slower change 1,2,3
	Hippocampus and Amygdala Volume
Infancy, toddlerhood	Higher	Lower	Lower
	Faster change	Slower change	Slower change
Childhood, adolescence	Higher	Lower	Lower
	Earlier peak	Later peak	Slower change
	Faster change	Slower change

The table depicts the predictions of accelerated versus delayed development and compares them to the patterns observed in empirical studies, with the top panel referring to cortical measures and the bottom panel subcortical measures. Bolded text indicates when a prediction matches an empirical observation, listed in the observed column. Of note, for measures that peak during childhood and adolescence such as surface area, cortical volume, and subcortical volume, if development were accelerated, values would be higher before the peak and lower after the peak. On the other hand, if development was delayed, values during childhood and adolescence would be lower before the peak and higher after the peak.

¹= Cortical Thickness,

²= Cortical Surface Area,

³= Cortical Volume