. Author manuscript; available in PMC: 2013 Jan 17.

Published in final edited form as: J Educ Psychol. 2012 Aug;104(3):603–621. doi: 10.1037/a0027571

Table 2.

Checks on the Success of Variable Many to One Matching. Binary Variables: Wald-tests from Logistic Regression.

	Logistic Regression

Baseline Measures	Main effect of retention (Wald χ², df = 1)	Retention × Quintile strata (Wald χ², df = 1)
Child Ethnicity: White vs. Non-white	5.40*	7.25*
Child Gender	1.20	0.52
Child Bilingual Status (1: yes; 0: no)	0.13	0.001
Child Economic Disadvantage Status (1: yes; 0: no)	0.03	0.16

Note. Tables 1 and 2 report the 40 tests for the 20 important variables, of which 3 were statistically significant across both tables. Two of the total number of tests would be expected to be significant by chance. Source: Wu, W., West, S. G., & Hughes, J. N. (2010). Effect of grade retention in first grade on psychosocial outcomes. Journal of Educational Psychology, 102, p. 144.