The Comprehensive Autistic Trait Inventory (CATI): development and validation of a new measure of autistic traits in the general population

Table 6 Results of a multi-group factorial analysis assessing measurement and structural invariance of the CATI as a function of participant sex

Model	χ²	df	CFI	RMSEA (90% CI)	Δχ²	Δdf	ΔCFI	ΔRMSEA	Decision
Configural Invariance	3937	1552	.989	.053 (.051–.055)	–	–	–	–	Accept
Metric (weak) invariance	4293	1712	.988	.052 (.050–.054)	356	160	.001	− .001	Accept
Scalar (strong) invariance	5114	1754	.985	.059 (.057–.061)	821	42	.003	.007	Accept
Residual (strict) invariance	5464	1796	.983	.061 (.059–.063)	350	42	.002	.002	Accept

ΔCFI > .01 and ΔRMSEA > .015 are indicative of a violation of the invariance assumption [49, 50]
CFI comparative fit index, RMSEA root mean square error of approximation

ISSN: 2040-2392