The effects of talker variability will be investigated with four groups of listeners (young
normal-hearing; old normal-hearing; young hearing-impaired; old hearing-impaired).
Experimental conditions will include between-talker differences, speaking rate, lexical
difficult and semantic/linguistic context. A preliminary experiment will evaluate the
relative merit of adaptive vs fixed-level methods of stimulus presentation.
John Fryer, Ph.D., Program Analyst
Program Analysis and Review Section (PARS), Rehabilitation Research & Development Service