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- Member of: ASU Electronic Theses and Dissertations
Description
Objective: Previous studies have observed that adults with dyslexia display a reduced N1 gating when exposed to repetitive stimuli. Robust gating is associated with the ability to recognize familiar stimuli and identify the stimuli that will need novel memory representations formed. This study investigates if the mismatch negativity component in electroencephalographic-produced Event-Related Potentials (ERPs) is affected as well by diminished memory forming in adults with dyslexia. Additionally, signal/ noise processing for auditory-based memory recollection and thus word learning is explored. Methods: Nineteen adults with dyslexia and 18 adult controls participated in a classic auditory oddball electroencephalographic experiment here referred to as DIFF, to indicate that the tones differed in frequency, while incorporating a decision-making task that signified participant tonal discrimination. Mismatch Negativity (MMN) amplitudes (AMPs) and latencies were collected from ERPs. Behavioral data consisting of reaction time (RT) and accuracy (ACC) of tone choice were documented.
Results: Group differences for accuracy and reaction time in the DIFF task were highly significant. The dyslexic group produced longer reaction times and with less accuracy than the control group. The Mismatch Negativity amplitude and latency collected did not differ significantly between groups, however, correlations to other variables obtained from similar studies consisting of the same participant group were observed. Linear regression models indicated predictions for accuracy and reaction time results based upon WID scores (Word Identification Test) and SWE scores (Sight Word Efficiency) respectfully.
Conclusions: Neural processing speed and the ability to form permanent memory representations of auditory sound bites for retrieval is dampened in dyslexic populations.
Significance: To better illuminate and understand the neural mechanisms of dyslexia, specifically auditory processing, with the goal of improving outcomes in individuals with dyslexia through more efficient therapy treatment options.
ContributorsAbrams, Gabrielle Renee (Author) / Peter, Beate (Thesis advisor) / Rogalsky, Corianne (Committee member) / Rao, Aparna (Committee member) / Arizona State University (Publisher)
Created2022
Description
Music is an important part of everyday life. It plays a crucial role for human connection and provides a communication network for emotions. Hearing loss can negatively impact the music experience. Although Cochlear Implants (CI) enable individuals with severe to profound hearing loss to successfully understand spoken language, many users find their experience with music less than satisfactory. Music training programs may offer a hopeful solution to recondition the music experience for CI users. However, music training programs available to CI users today generally carry more weight on improving the perceptual accuracy of music rather than enhancing appreciation and enjoyment. The primary objective of this review is to identify different types of music training programs and their connection to music appreciation. A brief overview of the factors that contribute to music appreciation are also provided.
ContributorsGellhaus, Jacynda (Author) / Luo, Xin (Thesis advisor) / Rao, Aparna (Committee member) / Berisha, Visar (Committee member) / Arizona State University (Publisher)
Created2021