Table 5. Comparison of machine learning model performance for predicting processing speed index (PSI) scores of children diagnosed with attention-deficit/hyperactivity disorder (ADHD).

	Training set			Test set
Model	RMSEa	MAEb	MAPEc (%)	RMSE	MAE	MAPE (%)
Random forest	14.307	11.813	11.828	15.517	13.165	12.314
AdaBoost	14.269	11.676	11.738	14.511	12.092	11.324
Elastic Net	13.458	10.58	10.352	12.488	8.328	7.993
SVRd	13.107	9.933	9.792	11.288	7.874	7.375

^aRMSE: root mean squared error.

^bMAE: mean absolute error.

^cMAPE: mean absolute percentage error.

^dSVR : support vector regression.