Effect	Estimate	SE	df	t value	p value
Grammaticality	0.028	0.012	73	2.314	0.023*
Morpheme	0.045	0.020	106	2.230	0.028*
Proficiency.z	−0.062	0.025	51	−2.465	0.017*
Trial.Z	−0.017	0.006	1807	−2.848	0.004**
Frequency.z	−0.079	0.024	42	−3.249	0.002**
Length.z	0.073	0.024	51	2.969	0.005**
Grammaticality: Morpheme	−0.021	0.025	84	−0.822	0.413
Grammaticality: Proficiency.z	−0.028	0.012	75	−2.3107	0.024*
Morpheme: Proficiency.z	−0.001	0.013	72	−0.115	0.909
Gramm: Morph:Prof.z	0.072	0.025	87	2.847	0.006**