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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