Table 5.

The R² values (i.e., variance explained) for the training and test datasets for each brain modality. No covariates were added to the model to quantify the variance explained by the brain alone. The R² as well as the number of children in the analysis and features included are displayed per modality. MID = Monetary Incentive Delay Task; SST = Stop Signal Task; rsfMRI = resting state functional magnetic resonance imaging.

	Training dataset		Testing dataset
Modality	R2	n	R2	n	# of brain features
Structure	0.27	5532	0.20	1319	396
rsfMRI	0.08	2739	0.05	653	166
MID	0.002	3787	0.0009	920	4
SST	0.03	3556	0.002	869	76
EN-back	0.04	3557	0.03	896	127