Journal
NEUROSCIENCE AND BIOBEHAVIORAL REVIEWS
Volume 116, Issue -, Pages 396-405Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neubiorev.2020.06.032
Keywords
Dyslexia; Mismatch negativity; Auditory processing; Meta-analysis
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Funding
- National Natural Science Foundation of China [31671155]
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Several previous studies have used mismatch negativity (MMN) to examine the auditory processing deficit in individuals with dyslexia. However, researchers have not clearly determined whether the deficit is general or specific and how it potentially changes with age. Meta-analysis was adopted to quantitatively identify the auditory processing deficit in individuals with dyslexia. By analysing 81 results within 25 publications that employed passive oddball paradigms to explore auditory processing in individuals with dyslexia, we identified that MMN impairment in auditory processing of speech was observed in children (Cohen's d = 0.296) and adults with dyslexia (Cohen's d = 0.486). Besides, adults with dyslexia showed atypical auditory processing of non-speech (Cohen's d = 0.409), which appeared to be related to the types of stimuli. Based on these findings, for individuals with dyslexia, the auditory processing deficit in speech will persist into adulthood, and the auditory processing deficit is general in adults with dyslexia. Because few studies used appropriate non-speech stimuli to examine the auditory processing in children with dyslexia, future studies should focus more on this area.
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