Table 2. SCQ-TF factor loadings and communalities.

		Factor 1: Social Interaction	Factor 2: Communication	Factor 3: Abnormal Language	Factor 4: Stereotyped Behavior	Communalities
Item 28	(S)	.768				.788
Item 31	(S)	.610				.662
Item 36	(S)	.605				.750
Item 20	(C)	.598				.745
Item 22	(C)	.597			.417	.695
Item 21	(C)	.584				.607
Item 32	(S)	.578				.764
Item 39	(S)	.574				.717
Item 35	(C)	.546				.734
Item 40	(S)	.534		.507		.740
Item 37	(S)	.508				.744
Item 27	(S)	.494				.685
Item 34	(C)	.494	.456			.800
Item 33	(S)	.477				.602
Item 12	(R)		.670			.586
Item 4	(C)		.626			.764
Item 3	(C)		.615			.823
Item 11	(R)		.607			.720
Item 6	(C)		.599			.786
Item 7	(R)		.570		.381	.758
Item 8	(R)		.556		.284	.842
Item 13	(R)		.527		.420	.684
Item 15	(R)		.419	.418		.693
Item 14	(R)		.410		.321	.672
Item 38	(–)	.252	.386	.245		.698
Item 26	(S)		.377			.771
Item 2	(C)			.565		.730
Item 17	(–)			.563		.781
Item 19	(S)			.562		.616
Item 10	(S)			.522		.748
Item 18	(–)			.510	.307	.641
Item 5	(C)			.503		.677
Item 16	(R)		.372	.436		.741
Item 23	(C)	.399		.404	.382	.706
Item 30	(S)	.262			.567	.782
Item 24	(C)		.371		.558	.895
Item 25	(C)		.446		.522	.881
Item 29	(S)	.299		.395	.400	.759
Item 9	(S)				.349	.820

S: Reciprocal social interaction domain; C: communication domain; R: restricted, repetitive, and stereotyped patterns of behavior domain; –: not in algorithm