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Table 2 Summary of goodness-of-fit statistics for tests of invariance across format types (PaP and web format)

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

Model description

RMSEA

CFI

χ 2

df

Δχ 2

Δdf

Statistical significance

1. Configural model: no constraints imposed

0.02

0.99

8.06

6

-

-

-

2. Factor loadings: constrained equally across groups

0.03

0.97

45.44

19

37.38

13

p < 0.0005