Table 2. K-ABC subtests' and Mathematic Test's cognitive workloads according to different models.

Test	Task name	Task description	Kaufman model [33]	MDS spatial model [23]	Working memory as g-factor
					Subtest variance shared with g [23]	PCA within healthy control sample (n = 312)
K-ABC	Number recalla	Repetition of a number of digits	sequential	low	.34	.48
K-ABC	Hand movementsa	Performance of a series of hand movements	sequential	intermediate	.53	.50
K-ABC	Word order	The child is asked to touch silhouettes of common objects as named by the tester	sequential	intermediate	.59	.69
K-ABC	Gestalt closureb	Naming of an object pictured in a partially completed drawing	simultaneous	intermediate	.58	.41
K-ABC	Matrix analogiesb	Selection of a picture that completes a visual analogy	simultaneous	intermediate	.63	.59
K-ABC	Triangles	Assembly of identical triangles into an abstract pattern that matches a model	simultaneous	intermediate	.60	.62
K-ABC	Spatial memory	Recall of the location of pictures on a page previously presented	simultaneous	low	.47	.48
K-ABC	Photo series	Chronological ordering of photographs of an event	simultaneous	intermediate	.67	.55
K-ABC	Riddles	The tester describes characteristics of a verbal concept and the child names it	achievement/reasoning	high	.84	.69
K-ABC	Arithmeticc	The child is asked to solve arithmetic problems	achievement/reasoning	high	.80	.71
Maths Test	Index scorec	29 items assessing numerical estimations, reasoning, and mental rotation abilities	-	-	-	.70

^aincorporated in the low cognitive workload scale;

^bincorporated in the moderate cognitive workload scale;

^cincorporated in the high cognitive workload scale.