Table 4.

Stepwise multiple regressions for autism symptom measures in ASC group.

Step	Variable	B	SE B	B	Cum R2
ADI-R Total (Current) (n = 18)
1	Constant	70.31	10.16
	BPVS	0.50	0.11	0.74***	0.74
2	Constant	87.54	9.67
	BPVS	0.39	0.10	0.58**	0.85
	SP TOTAL	0.12	0.04	0.46**
ADOS-II Total (n = 18)
1∧	Constant	24.00	3.39
	MABC TOTAL	0.21	0.06	0.65**	0.65
2	Constant	11.44	5.97
	MABC TOTAL	0.29	0.06	0.87***	0.77
	Matrices	0.18	0.08	0.47*
SCQ (n = 18)
1	Constant	59.40	6.72
	SP TOTAL	0.18	0.03	0.84***	0.70
2	Constant	69.93	7.23
	SP TOTAL	0.16	0.03	0.73***	0.79
	BPVS	0.18	0.07	0.31*
SCQ with ASC and TD group (n = 36)
1	Constant	55.67	3.89
	SP TOTAL	0.16	0.01	0.89***	0.80
2	Constant	63.32	4.59
	SP TOTAL	0.14	0.02	0.77***	0.83
	BPVS	0.14	0.05	0.23*

Note: *p < 0.05, **p < 0.01, ***p < 0.001. All Models with the exception of 1^∧ achieved >0.89 Statistical Power for a sample size of 18 and α 0.05 1^∧ Statistical Power = 0.67.