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Journal of Speech, Language, and Hearing Research Vol.41 1052-1060 October 1998.
© American Speech-Language-Hearing Association
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Auditory Temporal Order Perception in Younger and Older Adults

Peter J. Fitzgibbons 1
Sandra Gordon-Salant 2
1 Gallaudet University Washington, DC
2 University of Maryland College Park

sgordon{at}bss1.umd.edu

This investigation examined the abilities of younger and older listeners to discriminate and identify temporal order of sounds presented in tonal sequences. It was hypothesized that older listeners would exhibit greater difficulty than younger listeners on both temporal processing tasks, particularly for complex stimulus patterns. It was also anticipated that tone order discrimination would be easier than tone order identification for all listeners. Listeners were younger and older adults with either normal hearing or mild-to-moderate sensorineural hearing losses. Stimuli were temporally contiguous three-tone sequences within a 1/3 octave frequency range centered at 4000 Hz. For the discrimination task, listeners discerned differences between standard and comparison stimulus sequences that varied in tonal temporal order. For the identification task, listeners identified tone order of a single sequence using labels of relative pitch. Older listeners performed more poorly than younger listeners on the discrimination task for the more complex pitch patterns and on the identification task for faster stimulus presentation rates. The results also showed that order discrimination is easier than order identification for all listeners. The effects of hearing loss on the ordering tasks were minimal.

KEY WORDS: auditory temporal processing, temporal order discrimination, temporal order identification, age-related processes

Submitted on January 16, 1998
Accepted on June 15, 1998


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