Table 4.

Linear mixed-effect model: effect of No noise vs. 0 dB SNR, speech material, and age on envelope tracking

Fixed-Effect Terms	β Value	SE	df	t Ratio	P Value
Intercept (for Matrix/No noise)	0.202	0.0461	149	4.38	<0.001
0 dB SNR	−0.0384	0.00691	149	−5.55	<0.001
Speech material	0.0218	0.0249	149	0.875	0.38
Age	−0.00473	0.00194	51	−2.43	0.02
Age2	6.63e-05	2.02e-05	51	3.29	0.002
Speech material:age	−0.00111	4.66e-04	149	−2.37	0.02

Regression coefficients (β values), standard errors (SE), degrees of freedom (df), t ratios, and P values per fixed-effect term. SNR, signal-to-noise ratio. Colon indicates interaction.