. Author manuscript; available in PMC: 2022 Jun 4.

Published in final edited form as: J Educ Psychol. 2017 Mar 23;109(7):889–914. doi: 10.1037/edu0000181

Table 3.

Second Analysis: Growth curve model fixed effects for intervention group, grade, and group by grade interactions

Fixed Effects		Par.	CHT	WAT	WID	WPC	SRI	TSW	TPD	GRT
Pretest	Intercept	γ₀₀	4.25^**	456.00^**	404.05^**	439.57^**	7.55^**	19.31^**	4.08^**	3.94^**
	Intervention	γ₀₁	0.33	6.27^**	9.64^**	6.37^**	0.46	2.60	0.72	0.65
	Grade 1/2 vs. 3	γ₀₂	−4.08^**	−6.49^**	−17.46^**	−10.66^**	−4.57^**	−8.01^**	−1.70^**	−2.89^**
	Grade 1 versus 2	γ₀₃	−0.27	−4.84^**	−17.38^**	−9.70^**	−3.21^**	−6.31^**	−0.91^*	−0.83^**

Growth to Posttest	Intercept^a	γ₁₀	21.87^**	25.95^**	47.33^**	29.76^**	12.59^**	18.64^**	6.21^**	7.00^**
	Intervention	γ₁₁	18.15^**	15.80^**	19.37^**	14.80^**	8.61^**	9.56^**	6.21^**	4.23^**
	Grade 1/2 vs. 3	γ₁₂	−0.85	5.81^**	11.79^**	5.41^**	0.76	2.98^**	0.23	0.02
	Grade 1 versus 2	γ₁₃	−4.80^**	3.99^**	15.12^**	5.50^**	−0.12	3.99^**	0.28	−0.07
	Interv. X Grade 1/2 vs. 3	γ₁₄	0.46	1.18	5.62^*	1.30	0.58	2.44^*	0.40	0.03
	Interv. X Grade 1 versus 2	γ₁₅	−6.88^*	0.21	4.98	2.74	−0.92	1.92	1.88	0.66

Followup trajectory	Intercept^a	γ₂₀	2.93^*	−0.69	7.19^**	4.21^**	3.12^**	5.81^**	2.38^**	2.89^**
	Grade 1/2 vs. 3	γ₂₁	0.86^*	−0.05	−0.62	−0.28	0.22	−0.31	−0.54^**	−0.07
	Grade 1 versus 2	γ₂₂	1.37^**	1.32^**	0.94	1.56^**	0.52	0.68^**	0.83^**	0.95^**

Notes:

p < .05;

^**

p < .01.

all effects FDR corrected at p < .001. CHT = Challenge Test, WAT = WRMT Word Attack, WID = WRMT Word Identification, WPC = WRMT Passage Comprehension, SRI = Standardized Reading Inventory Comprehension, TSW = TOWRE Sight Word Efficiency, TPD = TOWRE Phonemic Decoding Efficiency, GRT = GORT Rate. All analyses reported in this table were performed on raw scores, unless the measure was from a WRMT-R subtest, and these were analyzed using W scores.