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Table 3 Differential item functioning statistics

From: Psychometric evidence of the Acceptance and Action Questionnaire-II (AAQ-II): an item response theory analysis in university students from Chile

 

Fit indices

 

Log-likelihood ratio test

Model

C2

df

AIC

BIC

adjBIC

 

LogL

X2

df

p-value

Configural

748.580***

28

30,425.170

30,946.070

30,634.750

 

-15,114.590

   

Slopes

754.143***

35

30,422.250

30,905.930

30,616.850

 

-15,120.123

11.073

7

0.135

Intercepts

808.608***

75

30,395.820

30,666.900

30,504.890

 

-15,146.910

53.576

40

0.074

Intercepts and Means

856.858***

77

30,444.760

30,705.210

30,549.550

 

-15,173.380

52.938

2

< 0.001

  1. Note. Fit indices: C2 = Limited-information goodness of fit test statistic; df = degrees of freedom; AIC = Akaike Akaike Information Criterion; BIC = Bayesian Information Criterion; adjBIC = Sample size adjusted BIC. Log-likelihood test: LogL = Log-likelihood; X2 = Chi-square.
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BMC Psychology

ISSN: 2050-7283

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