Table 4.

Standardized (β) coefficients in a model automatically generated by evaluating the significance of each variable’s contribution to perceptual 50 % crossover of the vocoded identification functions in the older normal-hearing (ONH) and older hearing-impaired (OHI) listeners

Variable	R2 change	β	P value
ONH listeners
Model 1	0.45		0.005
DISH STR DIFF		− 0.70	0.005
OHI listeners
Model 1	0.30		0.038
P1 AMP DIFF		0.60	0.038

The variables contributing to the variance in the vocoded crossover point differed by group. In the ONH listeners, the vocoded-related decrease in the DISH stimulus-to-response correlation (DISH STRDIFF) was the only significant factor, and in OHI listeners, the vocoded-related increase in DISH P1 amplitude (P1 AMPDIFF) was the only significant factor. The pure-tone average (PTA) was excluded from the model