Table 3. Significant clinical correlations.

EEG measure	Clinical scale
	Sensory profile—auditory	ABCL—withdrawn	ABC—hyperactivity	ABC—irritability	SCQ total score
N1 amplitude—initial tone	−0.67*	—	—	—	—
Percent change N1 amplitude—asymptote (final repetition)	−0.65*	−0.81**	0.76*	—	—
Percent change N1 ITC—asymptote (final repetition)	0.59*	−0.89**	—	—	—
N2 amplitude	0.74*	—	—	0.92***	0.78*
Delta/theta ITC (N2 initial stimulus)	−0.64*	—	—	—	—
Alpha/beta ITC (N1 first repetition)	0.67*	—	—	0.69*	—
Alpha ITC (N1 second repetition)	0.69*	—	—	—	—
Alpha ITC (N1 final repetition)	0.67*	0.76*	0.77**	0.74*	—
Baseline-corrected gamma STP (N1 initial stimulus)	—	0.67*	0.70*	0.68*	0.89**
Alpha/beta STP (N1 final repetition)	0.61*	—	—	—	—

Abbreviations: ABC, aberrant behavior checklist; ABCL, Achenbach adult and child behavior checklists; df, degree of freedom; EEG, electroencephalography; ITC, inter-trial coherence; NS, not significant; SCQ, social and communication questionnaire.

Note: for amplitude correlations on negative ERP components N1 and N2 (first and fourth items in the first column), negative correlations indicate an increased amplitude of response correlated to increased scores on the clinical scale, while positive correlations indicate a decreased amplitude of response correlated to increased scores on the clinical scale. EEG measures with no significant correlations to clinical variables are not included. All correlations are Spearman's ρ.

'—' indicates NS.

*P<0.05. **P<0.01. ***P<0.001.