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Table 4 Rasch Analysis of the original 24-item final version including the 5-point Likert response scale

From: Development and validation of the Brazilian version of the Attitudes to Aging Questionnaire (AAQ): An example of merging classical psychometric theory and the Rasch measurement model

Content

      

DIF Analyses

 

Item

Model χ 2 Fit (df)

P value

Item χ 2 Fit

Item Residual

Rev Threshold

Gender

Age

Depression

Subscale I

 

77.06 (40)

.00003

      
 

7

  

3.08

1.01

✓

   
 

10

  

12.77

-0.06

    
 

14

  

15.27

3.11

    
 

17

  

5.52

-0.60

    

PSI = .869

21

  

21.12

3.49

    
 

24

  

11.74

-1.25

✓

   
 

32

  

10.70

1.61

    
 

34

  

6.38

-1.07

✓

   

Subscale II

 

109.4 (48)

.00001

      
 

12

  

10.57

-0.41

✓

  

Uniform

 

13

  

6.57

.58

✓

   

PSI = .807

16

  

4.65

.02

✓

   
 

19

  

42.61

4.96

✓

  

Uniform

 

20

  

11.79

-1.04

    
 

22

  

17.47

3.76

✓

   
 

36

  

10.40

.66

    
 

37

  

5.34

.32

✓

   

Subscale III

 

59.06 (48)

.131

      
 

2

  

1.94

.54

✓

   
 

4

  

10.11

-0.31

✓

   

PSI = .745

8

  

3.17

1.24

✓

   
 

9

  

19.17

-2.05

✓

   
 

15

  

9.01

3.43

    
 

25

  

1.34

.37

    
 

30

  

6.73

1.58

✓

   
 

33

  

7.55

-1.73

✓

   
  1. In bold, item-residuals > 2.5 or item χ2 fit with p < .05 corrected for Bonferroni Multiple Comparisons