Table 3.

Intraclass Correlations for Interrater and Test-Retest Reliability for Toddler Module and Modules 1-4 of ADOS-2-PL and Cronbach’s alphas for internal consistency analysis.

	Toddler Module		Module 1		Module 2		Module 3	Module 4
	All younger / older with few to no words	Older with some words	Few to no words	Some words	Younger than 5 years	Aged 5 years and older
Interrater
SA	0.75	0.85	0.89	0.91	0.98	0.86	0.98	0.93
RRB	0.92	0.93	0.94	0.90	0.96	0.97	0.97	0.98
Overall total	0.77	0.83	0.93	0.91	0.97	0.87	0.96	0.94
Test–retest
SA	0.80	0.94	0.93	0.93	0.80	0.74	0.83	0.89
RRB	0.80	0.91	0.82	0.72	0.82	0.41	0.54	0.65
Overall total	0.83	0.95	0.93	0.93	0.87	0.71	0.87	0.88
Internal consistency
SA	0.92	0.86	0.93	0.93	0.85	0.86	0.90	0.92
RRB	0.68	0.64	0.79	0.72	0.79	0.78	0.68	0.76
Overall total	0.92	0.87	0.92	0.93	0.88	0.90	0.89	0.92

SA, Social Affect; RRB, Restricted and Repetitive Behavior.