Journal
PSYCHOPHYSIOLOGY
Volume 50, Issue 1, Pages 23-34Publisher
WILEY
DOI: 10.1111/j.1469-8986.2012.01477.x
Keywords
Age-related hearing loss; Speech perception; Pupillometry; Growth curve analysis
Funding
- Hearing Health Foundation Centurion Clinical Research Award
- National Institute on Deafness and other Communication Disorders [P50 DC00422]
- Research Facilities Improvement Program from the National Center for Research Resources, NIH [C06 RR14516]
- South Carolina Clinical and Translational (SCTR) Institute
- Medical University of South Carolina, NIH/NCRR [UL1 RR029882]
- NATIONAL CENTER FOR ADVANCING TRANSLATIONAL SCIENCES [UL1TR000062] Funding Source: NIH RePORTER
- NATIONAL CENTER FOR RESEARCH RESOURCES [UL1RR029882, C06RR014516] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS [P50DC000422] Funding Source: NIH RePORTER
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Listening to speech in noise can be exhausting, especially for older adults with impaired hearing. Pupil dilation is thought to track the difficulty associated with listening to speech at various intelligibility levels for young and middle-aged adults. This study examined changes in the pupil response with acoustic and lexical manipulations of difficulty in older adults with hearing loss. Participants identified words at two signal-to-noise ratios (SNRs) among options that could include a similar-sounding lexical competitor. Growth Curve Analyses revealed that the pupil response was affected by an SNR?x?Lexical competition interaction, such that it was larger and more delayed and sustained in the harder SNR condition, particularly in the presence of lexical competition. Pupillometry detected these effects for correct trials and across reaction times, suggesting it provides additional evidence of task difficulty than behavioral measures alone.
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