Abstract
Lexical access in the face of degraded speech: The effects of cognitive adaptation
The Journal of the Acoustical Society of America, Vol.144(3), pp.1800-1800
09/2018
DOI: 10.1121/1.5067944
Abstract
Hearing impaired listeners use cognitive adaptations to cope with degraded input. Here, we ask if they adapt processes that normal hearing listeners use to cope with the fact that speech unfolds over time, creating brief periods of ambiguity. Normal listeners cope with this ambiguity by activating multiple lexical candidates which compete for recognition (McClelland & Elman, 1986). These competition dynamics change when processing degraded input (Brouwer & Bradlow, 2016; McMurray, Farris-Trimble, & Rigler, 2017; McQueen & Huettig, 2012), but it is unclear whether this reflects the degraded input itself or cognitive adaptation. In two visual world paradigm experiments, listeners heard different levels of degraded (noise-vocoded) speech. Experiment 1 manipulated the level of degradation either in blocks or randomly interleaved across trials. Interleaving led to processing delays beyond that of the level of degradation: we found switch-costs when degradation levels differed between trials. This suggests differences in lexical dynamics are not solely due to degradation in the input. In Experiment 2, a visual cue indicated the level of degradation before each trial. This reduced the processing delays and switch costs, suggesting participants adapted before the auditory input. These experiments support a role for central processing in dealing with degraded speech input.
Details
- Title: Subtitle
- Lexical access in the face of degraded speech: The effects of cognitive adaptation
- Creators
- Francis Smith - Psychol. and Brain Sci., Univ. of Iowa, W311 Seashore Hall, Iowa City, IA 52245, francis-smith@uiowa.eduBob McMurray - Psychol. and Brain Sci., Univ. of Iowa, W311 Seashore Hall, Iowa City, IA 52245, francis-smith@uiowa.edu
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.144(3), pp.1800-1800
- DOI
- 10.1121/1.5067944
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Number of pages
- 1
- Date published
- 09/2018
- Academic Unit
- Communication Sciences and Disorders; Psychological and Brain Sciences; Iowa Neuroscience Institute; Otolaryngology; Linguistics
- Record Identifier
- 9984071671902771
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