Table 2.

Results of Differential Item Functioning Tests using One-Step Wald Test.

Subgroup		Items	X2	df	p	a		b
Gender						M	F	M	F
	8	with friends, feels pleasant	7.3	2	0.03	2.27	0.97	1.83	3.57
	19	Friday night, feelings of pleasure	4.8	2	0.09	2.53	1.56	0.66	1.00
Age Group						EM	ER	EM	ER
	2	friend's house/apartment	6.3	2	0.04	2.46	2.51	1.32	1.76
	19	Friday night, feelings of pleasure	7.7	2	0.02	1.88	2.77	0.72	0.92
Sex Partners						MN	C/E	MN	C/E
	13	Friday night, pleasant feelings, getting high	5.1	2	0.08	1.68	1.18	1.99	1.87
	21	new partner	5.7	2	0.58	1.74	0.96	0.74	0.79
Ethnicity						H	NHW	H	NHW
	1	hotel/motel	9.2	2	0.07	2.17	1.66	0.68	1.12
	2	friend's house/apartment	5.7	2	0.06	2.21	3.20	1.53	1.91
	19	Friday night, feelings of pleasure	6.8	2	0.03	2.09	1.18	1.78	1.94

Notes. p-values are compared against the adjusted critical values obtained from the Benjamini-Hochberg procedure (not shown here) to control for the false discovery rate, which is set at .05. p-values and item parameter values in bold-face indicate that they are significant. a = discrimination parameter; b = difficulty parameter; M = Male; F = Female; EM = Emerging adults; ER = Early adults; MN = Main partners; C/E = Casual or exchange partners; H = Hispanic; NHW = Non-Hispanic White.