Table 6.

Summary of hierarchical linear model for quality with executive function (EF) as a predictor.

Fixed effect	Coeff.	Std. error	T-ratio	d.f	P-value
STEP 1
For Intercept
Intercept	0.473	0.022	21.186	26	<0.001
EF	−0.058	0.031	−1.867	26	0.073
For Slope
Fidelity index	1.081	0.039	27.858	26	<0.001
EF	0.028	0.067	0.415	26	0.681
STEP 2
For Intercept
Intercept	0.491	0.050	9.765	25	<0.001
EF	−0.057	0.030	−1.874	25	0.072
PTA	−0.000	0.001	−0.483	25	0.633
For Slope
Fidelity index	0.975	0.113	8.637	25	<0.001
EF	0.021	0.067	0.313	25	0.757
PTA	0.003	0.003	1.109	25	0.279
STEP 3
For Intercept
Intercept	0.273	0.087	3.145	24	0.005
EF	−0.062	0.029	−2.160	24	0.040
PTA	−0.0004	0.001	−0.430	24	0.670
Age	0.003	0.001	2.388	24	0.025
For Slope
Fidelity index	1.081	0.280	3.867	24	0.001
EF	0.024	0.069	0.344	24	0.733
PTA	0.003	0.003	1.076	24	0.293
Age	−0.001	0.003	−0.433	24	0.669

Amount of hearing loss (PTA) is average of thresholds at 1, 2, 3, and 4 kHz in the test ear.