. Author manuscript; available in PMC: 2012 Jul 1.

Published in final edited form as: Int J Soc Psychiatry. 2011 May 31;58(4):386–392. doi: 10.1177/0020764011400999

Table 2.

YSR Depression and Anxiety Items with evidence of Differential Item Functioning: Analysis by Threshold

Item	2PL IRT Model
	Estimate	CI	DIF ETS criteria
	Estimate	CI	Point estimate	CI
Item 14, threshold a. I cry a lot.	1.368	0.823; 1.913	C	C
Item 14, threshold b. I cry a lot.	1.428	0.545; 2.311	C	B
Item 31, threshold a. I am afraid I might think or do something bad. ^*	−0.360	−0.854; 0.134	A	A
Item 50, threshold a. I am too fearful or anxious.	0.676	0.263; 1.089	C	A
Item 50, threshold b. I am too fearful or anxious.	0.725	−0.033; 1.483	C	A
Item 52, threshold a. I feel too guilty.^*	−0.625	−1.250; 0.0003	C	A
Item 32, threshold a. I feel that I have to be perfect.^*	−0.654	−1.119; −0.189	C	A
Item 71, threshold a. I am self-conscious or easily embarrassed.^*	−0.426	−0.779; −0.073	A	A

ETS Criteria: A DIF is negligible; B is moderate DIF and C is large DIF; ~p<=0.1, * P<=0.05, ** p<=0.01, *** p<=0.001.

For threshold b there was no evidence of DIF