Presentation Information
[P3-30]Effects of non-temporal auditory features on timing judgments in healthy adults and cochlear-implant users
*Carolyn Kroger1, Deborah R. Fu1, Renee Banakis Hartl1, Ruth Y. Litovsky2, Anahita H. Mehta1 (1. University of Michigan (United States of America), 2. University of Wisconsin - Madison (United States of America))
Keywords:
Time perception,Kappa effect,Auditory timing,Perceptual interactions,Aging
The kappa effect manifests as a perceptual bias in relative onset timing between subsequent events as a function of non-temporal (e.g. spatial) proximity. In the auditory domain, kappa effects have previously been shown for tone sequences, where tones closer in pitch were judged as occurring closer in time than tones farther in pitch. Recently, our lab established an auditory spatial kappa (ASK) effect, where two sounds presented closer in space were judged as relatively closer in time than a third, more distant sound. The present study examined temporal biasing effects of non-temporal cues in healthy aging and individuals with cochlear implants. In one experiment, we tested younger and older adults with normal hearing on ASK tasks with congruent or conflicting pitch and spatial cues. In a second experiment, we tested individuals with single-sided deafness and a cochlear implant in their deaf ear on ASK tasks to evaluate this task as an implicit measure of auditory spatial cue restoration with cochlear implantation. Results will be discussed in terms of effects of healthy aging on temporal and non-temporal auditory feature interactions as well as clinical applications of auditory spatial kappa tasks for individuals with hearing loss and cochlear implants.