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Table 4 Dimension LA: Item difficulties, standard errors, Infit, Outfit, T-test and correlations, estimated from final models

From: Rasch analysis of consumer attitudes towards the mountain product label

INPUT: 310 PERSON, 47 ITEM

REPORTED: 188 PERSON 17 ITEM 5 CATS

PERSON: REAL SEPARATION: 3.68 RELIABILITY.: 0.93

ITEM: REAL SEPARATION: 6.88 RELIABILITY.: 0.98

ITEM

DIFFICULTY MEASURE

MODEL S.E

INFIT

OUTFIT

PTMEA CORR

MNSQ

Ttest

MNSQ

Ttest

LA14

2.12

.14

1.06

.52

1.09

.77

.86

LA17

1.57

.14

1.06

.52

1.07

.64

.87

LA07

1.33

.14

.90

 − .84

.86

 − 1.18

.88

LA16

1.01

.14

.85

 − 1.30

.84

 − 1.35

.88

LA10

.97

.14

1.22

1.78

1.29

2.17

.84 (*)

LA11

.14

.15

1.11

.98

1.05

.45

.84

LA06

.08

.15

1.08

.68

1.09

.68

.84

LA15

 − .03

.15

.73

 − 2.48

.72

 − 2.27

.88 (*)

LA05

 − .07

.15

.89

 − .93

.84

 − 1.17

.86

LA08

 − .25

.15

.89

 − .91

.87

 − .93

.85

LA04

 − .38

.15

1.07

.63

1.01

.09

.83

LA12

 − .38

.15

.81

 − 1.70

.80

 − 1.45

.86

LA18

 − .45

.15

.93

 − .53

.86

 − .98

.84

LA03

 − 1.28

.16

.80

 − 1.85

.75

 − 1.36

.83

LA09

 − 1.35

.16

1.43

3.25

1.33

1.56

.75 (*)

LA02

 − 1.50

.16

.96

 − .26

.87

 − .58

.80

LA01

 − 1.53

.16

1.20

1.65

1.16

.78

.77

MEAN

.00

.15

1.00

.0

.97

 − .2

 

P.SD

1.07

.01

.17

1.4

.18

1.2

 
  1. (*) INFIT or OUTFIT |Ttest|>2