Table 4.

Item and domain correlations with chronological and cognitive age

Module 2			Module 3
	Chron. age	Cogn. age		Chron. age	Cogn. age
SA total score	0.113	− 0.023	SA total score	− 0.299	0.151
Pointing	0.071	0.143	Reporting of events	− 0.281	0.033
Descriptive, conventional, instrumental, or informational gestures	− 0.14	− 0.184	Conversation	− 0.306	0.117
Unusual eye contact	− 0.07	0.076	Descriptive, conventional, instrumental, or informational gestures	− 0.106	− 0.008
Facial expressions directed to others	0.282	− 0.028	Unusual eye contact	− 0.163	− 0.026
Shared enjoyment in interaction	0.334	0.064	Facial expressions directed to examiner	− 0.165	− 0.055
Showing	0.198	0.019	Shared enjoyment in interaction	− 0.225	0.384*
Spontaneous initiation of joint attention	0.029	0.091	Quality of social overtures	− 0.299	0.073
Quality of social overtures	− 0.046	− 0.166	Quality of social response	− 0.409*	0.072
Amount of reciprocal social communication	0.007	− 0.372	Amount of reciprocal social communication	− 0.209	0.144
Overall quality of rapport	0.231	0.103	Overall quality of rapport	− 0.181	0.373*
RRB total score	− 0.015	0.070	RRB total score	− 0.290	0.094
Stereotyped/idiosyncratic use of words or phrases	− 0.08	− 0.061	Stereotyped/idiosyncratic use of words or phrases	− 0.144	− 0.007
Unusual sensory interest in play material/person	− 0.025	− 0.052	Unusual sensory interest in play material/person	− 0.096	0.011
Hand and finger and other complex mannerisms	0.029	0.153	Hand and finger and other complex mannerisms	–a	–a
Unusually repetitive interests or stereotyped behaviors	0.029	0.153	Excessive interest in or references to unusual or highly specific topics or objects or repetitive behaviors	− 0.241	0.383*

^aItem had a zero variance

*p < 0.05