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

Published in final edited form as: Assess Eff Interv. 2011 Jul 13;37(3):131–146. doi: 10.1177/1534508411413913

Table 5.

Maze Weighted Slopes, Standard Errors of Slope, and Correlations Between Slope and Reading Achievement

Grade	Familiar			Novel

	Slope
	N	M	SD	n	M	SD
6	247	0.46	0.27	281	0.21	0.26
7	161	0.46	0.27	141	0.22	0.29
8	267	0.43	0.27	246	0.17	0.29

	SEE and Mean SE_b^a
	SEE		SE_b	SEE		SE_b

6	3.91		0.17	4.55		0.19
7	3.67		0.16	4.77		0.21
8	4.04		0.18	5.20		0.23

	Correlation (Slope With Outcome)
	TOWRE	WJPC	GRADE	TOWRE	WJPC	GRADE

6	.38	.42	.32	.30	.30	.29
7	.25	.43	.42	.11	.17	.14
8	.34	.47	.55	.28	.28	.33

Note. Means and correlations are weighted based on population proportions of Typical and Struggling students. Individual-level slopes were calculated using ordinary least squares regression. Slope units are number of words correctly identified per week. TOWRE = Test of Word Reading Efficiency (Torgesen, Wagner, & Raschote, 1999); WJPC = Woodcock-Johnson III Passage Comprehension (Woodcock, McGrew, & Mather, 2001); GRADE = Group Reading Assessment and Diagnostic Evaluation Passage Comprehension (Williams, 2002)

SEEs (standard errors of estimate) was estimated for each grade and passage protocol group (Familiar/Novel; see results for formula). Mean SE_b (standard errors of slope) estimates are based on the square root of the mean of the squared SE_bi’s (see results for SE_bi formula).