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Table 5 Results of tests for measurement invariance in SBQ-ASC across the diagnosed autistic and possibly autistic adult groups

From: Development and validation of the suicidal behaviours questionnaire - autism spectrum conditions in a community sample of autistic, possibly autistic and non-autistic adults

Model

Χ2

df

Model fit

CFI

TLI

ΔM

Model difference

P

RMSEA

Δdf

Δχ2

M1: configural invariance (unconstrained)

7.56

8

.001

1

1.001

   

.478

M2: metric invariance

10.53

11

.001

1

1.001

M2–M1

3

2.97

.396

1M3: scalar invariance

11.67

12

.001

1

1.001

M3–M2

1

1.14

.286

M4: residual invariance

26.07

16

.039

.988

.985

M4–M3

4

14.41

.006

  1. RMSEA = Root-mean-square error of approximation. CFI = comparative fit index. TLI = Tucker-Lewis Index
  2. 1Marginally significant degradation in fit is seen after this model (increase in RMSEA > .015 and reduction in CFI > .01)
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Molecular Autism

ISSN: 2040-2392