Table 3.

Linear mixed-effect model: effect of speech understanding, speech material, masker, and age on envelope tracking

Fixed-Effect Terms	β Value	SE	df	t Ratio	P Value
Intercept (for Matrix/SWN)	0.0274	0.0351	799	0.781	0.44
SU	0.00169	3.98e-04	799	4.24	<0.001
Speech material	0.033	0.00756	799	4.37	<0.001
Masker	0.0453	0.00777	799	5.82	<0.001
Age	−0.00107	0.00152	51	−0.704	0.48
Age2	1.13e-05	1.60e-05	51	0.708	0.48
Speech material:masker	−0.0537	0.00606	799	−8.85	<0.001
SU:age	−4.39e-05	1.74e-05	799	−2.52	0.01
SU:age2	6.03e-07	1.86e-07	799	3.25	0.001
SU:speech material	−3.95e-04	1.06e-04	799	−3.72	<0.001
SU:masker	−3.57e-04	1.12e-04	799	−3.18	0.002

Regression coefficients (β values), standard errors (SE), degrees of freedom (df), t ratios, and P values per fixed-effect term. Age², age squared; SU, speech understanding; SWN, speech-weighted noise. Colon indicates interaction.