Table 2.

Correlation analysis among the study variables.

Variable			Mean PTVa		Mean error		Mean PTb		Off-task gaze		Head movement		Head rotation		Impulsivity		Hyperactivity		Inattention		Emotional dysregulation
Mean PTV
	r	—c
	P value	—
Mean error
	r	0.079		—
	P value	.54		—
Mean PT
	r	0.174		0.069		—
	P value	.18		.60		—
Off-task gaze
	r	0.325		0.251		0.056		—
	P value	.01		.05		.67		—
Head movement
	r	0.348		0.080		0.236		0.423		—
	P value	.006		.54		.07		<.001		—
Head rotation
	r	0.262		0.038		0.297		0.069		0.505		—
	P value	.04		.77		.02		.60		<.001		—
Impulsivity
	r	0.115		0.346		-0.066		0.181		–0.006		0.004		—
	P value	.38		.006		.62		.16		.96		.97		—
Hyperactivity
	r	0.202		0.339		0.325		0.071		0.345		0.298		0.224		—
	P value	.12		.008		.01		.59		.006		.02		.08		—
Inattention
	r	0.176		0.186		0.006		0.280		0.161		–0.079		0.500		0.377		—
	P value	.18		.15		.97		.03		.21		.54		<.001		.003		—
Emotional dysregulation
	r	–0.03		0.147		–0.215		0.294		0.047		–0.047		0.395		–0.061		0.308		—
	P value	.82		.26		.10		.02		.72		.72		.002		.64		.02		—

^aPTV: processing time variability.

^bPT: processing time.

^cNot applicable.