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Table 6 DIF class specification for the 3 groups on the social items

From: The Imperforate Anus Psychosocial Questionnaire (IAPSQ): Its construction and psychometric properties

PERSON SUMMARY DIF    ITEM
Groups CHI-SQUARE D.F. PROB. Number Name
3 .8312 2 .6581 1 SCHOO4
3 1.7952 2 .4039 2 TEACH5
3 1.1539 2 .5588 3 FRIEND6
3 6.5071 2 .0378 4 GYMN7
3 3.9308 2 .1377 5 SHOW8
3 2.1503 2 .3376 6 BREAK9
3 .2749 2 .8728 7 ACTI10
3 3.4232 2 .1778 8 FRIEN28
3 1.9843 2 .3671 9 DECI29
3 4.5712 2 .0998 10 TEAS30
2* 3.1456 1 .0761 11 BULLY31
0 .0000 0 1.0000 12 TOGETHER
  1. One item, differently scored by the groups, is in boldface
  2. * The IA children are not included, due to zero variance.
  3. All children answered '5'
  4. Total Chi2 = 29.8 d.f. = 21, p = 0.096