. Author manuscript; available in PMC: 2013 Aug 22.

Published in final edited form as: Psychol Addict Behav. 2011 Mar;25(1):80–89. doi: 10.1037/a0021874

Table 2.

Categorical Models of the Accuracy and Bias in Estimates of Peer Substance Use: Teen Survey Data, N = 161

Effect	Contrast	Tobacco Use			Alcohol Use			Marijuana Use

		Estimate	SE	χ²	Estimate	SE	χ²	Estimate	SE	χ²
Intercept	a vs. d	−1.94	0.38	25.60^**	−1.49	0.38	15.12^**	−0.05	0.42	0.01
	b vs. d	−1.94	0.38	25.64^**	−0.98	0.29	11.65^**	−0.78	0.44	3.11
	c vs. d	−1.81	0.29	39.73^**	−1.69	0.30	30.94^**	0.00	0.32	0.00
Use (No)	a vs. d	0.96	0.38	6.17^*	1.40	0.38	13.31^**	1.35	0.42	10.50^**
	b vs. d	0.98	0.38	6.52^*	1.22	0.29	17.87^**	0.70	0.43	2.65
	c vs. d	0.16	0.29	0.32	0.11	0.30	0.13	0.39	0.31	1.53
Gender (female)	a vs. d	−0.23	0.24	0.95	0.05	0.23	0.04	0.11	0.23	0.23
	b vs. d	−0.07	0.23	0.08	−0.01	0.21	0.00	−0.43	0.31	1.93
	c vs. d	−0.28	0.27	1.06	0.05	0.30	0.03	0.45	0.26	2.99

Note:

p < .05.

^**

p < .01.

Contrasts: a vs. d = Correct rejection vs. hit; b vs. d = miss vs. hit; c vs d = false alarm vs. hit