|
Item
|
Educational groupa
|
DIF contrastb
|
Prob (Welch t)c
|
|---|
|
Apnea
|
1 vs 3
|
−1.01
|
.0003
|
|
Psoriasis
|
1 vs 3
|
−.70
|
.0005
|
|
Adrenalin
|
1 vs 3
|
−.67
|
.8777
|
|
Malaise
|
1 vs 3
|
−.63
|
.0005
|
|
Delirium
|
1 vs 3
|
−.53
|
.0128
|
|
Chlamydia
|
1 vs 3
|
−.50
|
.0059
|
|
Psoriasis
|
2 vs 3
|
−.72
|
.0001
|
|
Chlamydia
|
2 vs 3
|
−.60
|
.0002
|
|
Delirium
|
1 vs 2
|
−.70
|
.0007
|
|
Apnea
|
1 vs 2
|
−.62
|
.0260
|
|
Palliation
|
3 vs 2
|
−.74
|
.0000
|
|
Prenatal
|
3 vs 2
|
−.76
|
.0000
|
|
Euphoria
|
2 vs 1
|
−.75
|
.0014
|
|
Pancreas
|
2 vs 1
|
−.59
|
.0015
|
|
Euphoria
|
3 vs 1
|
−1.17
|
.0000
|
|
Pancreas
|
3 vs 1
|
−.91
|
.0000
|
|
Prenatal
|
3 vs 1
|
−.96
|
.0000
|
|
Palliation
|
3 vs 1
|
−.53
|
.0044
|
- aNote. Education group 1 = low; 2 = middle; 3 = high
- bNote. The DIFcontrast measure illustrates the difference between the item measures or the difference of the item between two groups. A difference of at least 0.50 logits is required for DIF to be noticeable. A negative DIF contrast means that the item was easier for the group on the left, whereas a positive DIF contrast means that the item was more difficult for the group on the left
- cNote. The Prob illustrates the probability of observing this amount of contrast by chance. Only items that are statistically significant at the p < 0.05 level are displayed
