Internal consistency and measurement equivalence of the cannabis screening questions on the paper-and-pencil face-to-face ASSIST versus the online instrument

Table 5 Summary of goodness-of-fit statistics for invariance tests across the two random subsamples

Model description	RMSEA	CFI	χ ²	df	χ ² /df	Δχ ²	Δdf	Statistical significance
1. Configural invariance: no constraints imposed	0.03	0.99	26.80	14	1.9	-	-	-
2. Factor loadings: constrained equally across groups	0.02	0.99	32.31	19	1.7	5.51	5	p = 0.4
3. Factor loadings and variances: constrained equally	0.02	0.99	32.33	20	1.6	5.53	6	p = 0.5
4. Factor loadings, variances, and error covariances: constrained equally	0.02	0.99	38.76	28	1.4	11.97	14	p = 0.6

ISSN: 1747-597X