Table 8.

Partial Cohen's d and partial eta (η) effect sizes for fixed effects in conditional growth models including interactions between SLI and covariates.

Parameter	Missing Do		Ungrammatical Lex		Ungrammatical Do + Lex		Double Tense
	Total R2 = .175		Total R2 = .184		Total R2 = .215		Total R2 = .242
	d	η	d	η	d	η	d	η
Linear age slope	0.56	.27	0.33	.16	0.52	.25	0.83	.38
Quad age slope	−0.96	−.43	−0.42	−.21	−1.29	−.54	−0.25	−.13
Linear age cohort	0.38	.19	0.32	.16	0.37	.18	−0.05	−.02
Quad age cohort							0.25	.12
SLI on int	−0.35	−.17	−0.39	−.19	−0.36	−.18	−0.50	−.24
SLI on slope	−0.08	−.04	0.04	.02	0.11	.06	−0.14	−.07
SLI on quad			0.09	.04
NVIQ on int	0.11	.06	0.16	.08	0.14	.07	0.08	.04
NVIQ on slope	0.12	.06	0.01	.01	0.02	.01	0.03	.02
NVIQ on quad			−0.23	−.12
NVIQ × SLI on int	0.11	.05	0.13	.07	0.19	.09	0.10	.05
NVIQ × SLI on slope	−0.03	−.01	0.08	.04	−0.01	.00	0.15	.07
NVIQ × SLI on quad			0.02	.01
M-Ed on int	0.28	.14	0.10	.05	0.18	.09	0.29	.14
M-Ed on slope	0.03	.02	0.15	.07	0.04	.02	0.23	.12
M-Ed on quad			0.13	.07
M-Ed × SLI on int	0.00	.00	0.05	.03	0.10	.05	−0.03	−.01
M-Ed × SLI on slope	0.07	.04	−0.09	−.04	−0.06	−.03	−0.08	−.04
M-Ed × SLI on quad			−0.13	−.06
BvG on int	−0.10	−.05	0.01	.01	−0.06	−.03	−0.11	−.06
BvG on slope	−0.28	−.14	−0.16	−.08	−0.24	−.12	−0.20	−.10
BvG on quad			0.07	.04
BvG × SLI on int	0.00	.00	0.05	.02	−0.07	−.03	0.03	.01
BvG × SLI on slope	0.16	.08	0.12	.06	0.10	.05	0.14	.07
BvG × SLI on quad			−0.14	−.07

Note. Effects sizes shown in bold indicate significant fixed effects at p < .01 in the final models. “Partial” refers to the unique contribution of each predictor after controlling for its overlap with other predictors in the model. Blank cells indicate effects not included in a model due to nonsignificance. SLI = specific language impairment: unaffected (coded as 0) versus SLI affected (coded as 1); Quad = quadratic; int = intercept; NVIQ = nonverbal IQ; M-Ed = maternal education; BvG = boys (coded as 0) versus girls (coded as 1).