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ORIGINAL ARTICLE
INVESTIGATING THE ASSOCIATION BETWEEN
WORKING MEMORY, SPEECH IDENTIFICATION
IN NOISE, AND P300 IN ADULTS WITH HEARING
IMPAIRMENT
1
Cognitive Hearing Science Laboratory, Department of Audiology and Speech Pathology,
University of Arkansas for Medical Science/University of Arkansas at Little Rock,
Little Rock, AR, USA
2
Auditory Electrophysiology and (Re)habilitation Laboratory, Department of Audiology
and Speech Pathology, University of Arkansas for Medical Science/University of
Arkansas at Little Rock, Little Rock, AR, USA
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article;
Publication date: 2017-03-31
Corresponding author
Naveen K. Nagaraj
Naveen K. Nagaraj, Department of Audiology and Speech Pathology, 2801 S. University Avenue, Little Rock, AR 72204, USA, e-mail: nnagaraj@uams.edu
Naveen K. Nagaraj, Department of Audiology and Speech Pathology, 2801 S. University Avenue, Little Rock, AR 72204, USA, e-mail: nnagaraj@uams.edu
J Hear Sci 2017;7(1):41-46
KEYWORDS
ABSTRACT
This study investigated the association between working memory capacity (WMC), P300 amplitude and latency, and their relation to speech
identification in noise (SiN) in individuals with sensorineural hearing impairment (HI). Twenty adults (mean age=58 years) were recruited
and their WMC was measured using a reading span task. SiN was evaluated using the clinical Quick speech-in-noise test. Auditory P300 latency and amplitude, which are known to index information processing, were recorded using a conventional oddball paradigm. WMC was
significantly correlated with P300 latency, but was not associated with P300 amplitude (before or after controlling for age and magnitude of
HI). In addition, SiN was not significantly correlated with WMC, P300 latency, or amplitude. P300 using tonal stimuli may be a good measure of speed of information processing and attentional control within the working memory system; however, it does not appear to be related to SiN in adults with HI.
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