Table 11.

Fixed effects in model of comprehension accuracy in Relative Clause Extraction sentences

	Fixed effect	Estimate	SE	p-value
	(Intercept)	1.850	0.186	<0.001
Individual differences	VWM	0.378	0.096	<0.001
	Inhib.	−0.025	0.140	0.860
	Phon.	0.194	0.120	0.104
	Lang.	0.437	0.123	<0.001
	Speed	0.103	0.089	0.246
Condition effects	ORC	−0.464	0.155	0.003
	RCQ	−0.595	0.353	0.092
	ORC × RCQ	−0.472	0.309	0.127
Individual difference × Condition interactions	VWM × ORC	0.102	0.115	0.376
	VWM × RCQ	0.058	0.113	0.605
	Inhib. × ORC	0.147	0.169	0.386
	Inhib. × RCQ	−0.245	0.166	0.139
	Phon. × ORC	−0.180	0.147	0.221
	Phon. × RCQa	−0.249	0.143	0.082
	Lang. × ORC	−0.020	0.158	0.898
	Lang. × RCQ	−0.190	0.155	0.222
	Speed × ORCa	0.195	0.109	0.074
	Speed × RCQ	0.091	0.107	0.395
	VWM × ORC × RCQ	−0.013	0.227	0.955
	Inhib. × ORC × RCQ	−0.012	0.333	0.971
	Phon. × ORC × RCQ	0.363	0.289	0.209
	Lang. × ORC × RCQ	−0.653	0.314	0.037
	Speed × ORC × RCQ	−0.325	0.216	0.131

Notes: Effects coding was used for the condition effects. The condition effects here refers to the change in the log odds of correct responding when given an object-extracted relative clause (0.5) opposed to subject-extracted (−0.5) and receiving a comprehension question that probed the relative clause region of the sentences (0.5) opposed to the main clause (−0.5). Random intercepts and slopes for all condition effects for both subjects and items were also included in the model. “VWM” = Verbal working memory span; “Inhib” = Inhibitory control; “Speed” = Perceptual speed; “Phon.” = Phonological ability; “Lang.” = Language experience.

^aThese effects reached significance in the model if inhibitory control and its interactions were dropped.