. 2009 Dec 29;40(6):751–761. doi: 10.1007/s10803-009-0928-8

Table 3.

Hierarchical regression analysis of perceived friendship qualities by CA, VIQ, Attachment, ToM and their interactions

Predictors	Friendship quality scale
	Companionship		Intimacy		Closeness
	β	ΔR ²	β	ΔR ²	β	ΔR ²
Step 1		.08^c		.03		.02
CA	−.15		−.09		−.10
VIQ	−.21^c		.16		.09
Step 2		.02		.16^c		.19^a
CA	−.18		−.16		−.19^c
VIQ	−.24^c		.07		.01
Nationality	.11		.25^b		.34^a
Disability	.09		.36^a		.33^a
Step 3		.13^a		.11^a		.10^a
CA	−.12		−.10		−.13
VIQ	−.27^b		.04		−.04
Nationality	−.03		.12		.22^c
Disability	−.04		.24^b		.21^c
¹IPPA-G	.33^b		.28^b		.39^b
²SA	.10		.12		−.03
Step 4		.01		.00		.01
CA	−.12		−.10		−.13
VIQ	−.22^c		.04		.00
Nationality	−.07		.12		.19^c
Disability	.01		.24^b		.25^c
IPPA-G	.35^b		.28^b		.40^b
SA	.09		.12		−.03
³ToM	−.16		−.00		−.13
Step 5		.04^c		.05^c		.04^c
CA	−.05		−.08		−.18^c
VIQ	−.21^c		.10		.00
Nationality	−.10		.12		.23^c
Disability	.00		.24^b		.30^b
IPPA-G	.40^b		.27^c		.20
SA	.12		.15		−.09
ToM	−.19		−.02		−.04
SA × ToM	−.22^c				.20^c
⁴Dis. × SA			−.22^c
R ²	.28^b		.35^a		.36^a

^a p < .001; ^b p < .01; ^c p < .05

Note: ¹IPPA-G: global mother–child relationships; ²SA-secure attachment based on the KSS; ³ToM: theory of mind based on second-order false-belief task; ⁴Dis = disability ASD/typical