Table 4.

MTMM Analyses for the Internalizing, Externalizing, and Prosocial SDQ Subscales

		Parent‐report SDQ			Self‐report SDQ
		Int	Ext	Pro	Int	Ext	Pro
Parent‐report SDQ	Int	α = 0.75
	Ext	0.40	α = 0.78
	Pro	−0.22	−0.33	α = 0.81
Self‐report SDQ	Int	0.53	−0.02	−0.10	α = 0.80
	Ext	0.06	0.53	−0.10	0.27	α = 0.69
	Pro	−0.02	−0.10	0.47	−0.19	−0.23	α = 0.73

MTMM = multi‐trait multimethod, Int = internalizing, Ext = externalizing, Pro = prosocial. n =126 parents; n = 98 adolescents/adults with ASD; n = 79 for parent‐self‐report comparison. Values are Spearman's correlation coefficients, except values in the diagonals which are Cronbach's alphas. Cross‐method correlations of same traits are presented in bold.

P < 0.001.