Table 4.

Frequency of itemized Schizoid PD Trait Index symptom endorsement in ASD vs. control participants per parent and self report

	Endorsement of “almost always true”				Endorsement of either “often true” or “almost always true”
	ASD		Control		ASD		Control
Criterion	Parents (n=49)	Self (n=50)	Parents (n=22)	Self (n=22)	Parents (n=49)	Self (n=50)	Parents (n=22)	Self (n=22)
Neither desires nor enjoys close relationships, including family	.08	.04	.05	0	.22	.18	.09	.05
Almost always chooses solitary activities*	.18	.18	0	0	.49	.44	.18	.09
Rarely, if ever, claims or appears to experience strong emotions, anger/joy	.08	.08	.05	.05	.20	.22	.09	.14
Little, if any, desire to have sexual experiences with another person (age taken into account)	.35	.18	.14	.09	.39	.26	.18	.18
Indifferent to praise and criticism from others	.02	.06	0	.05	.16	.16	0	.09
No close friends or confidants, or only one, other than first-degree relatives **	.53	.34	.14	.18	.76	.46	.23	.23
Constricted affect, aloof, cold, rarely reciprocated	.10	.08	0	0	.22	.18	0	.14

^*For between groups difference at the level of endorsement, “almost always true,” Fisher’s exact p = .049 for both parent and self report; for between groups differences at the level of “often” or “almost always true,” Fisher’s exact p = .018 for parent report and .006 for self

^**For between groups difference at the level of endorsement, “almost always true,” Fisher’s exact p = .002 for parent report and .261 for self report; for between groups differences at the level of “often” or “almost always true,” Fisher’s exact p = .0001 for parent report and .072 for self