Table 3.

Cross validation for linear regression models

Train	Test	Repeat	No. of Folds (F)
Leave-one-task-out
Subject = S	Subject = S	$t\in T$	6
Task = T\{t}	Task = t
Leave-one-subject-out
Subject = S\{s}	Subject = s	$\text{s}\in \text{S}$	10
Task = T	Task = T

S = {1,2...10} is the set of all subjects and T = {1,2,...6} is the set of all tasks. If s = {1} then S\{s} = {2,3,...10}.