High Background Noise Levels More Troublesome in Dyslexic Adults

by Nancy Needhima on  November 25, 2011 at 12:46 PM Education News
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High Background Noise Levels More Troublesome in Dyslexic Adults
While the cause of dyslexia remains partially unclear, it continues to affect up to 17.5% of the population. Study supports the hypothesis about the symptoms of dyslexia, including difficulties in reading, are at least partly because of the difficulty in excluding excess background information like noise. The report was published in the Nov. 23 issue of the online journal PLoS ONE.

In the study of 37 undergraduate students, the researchers, led by Rachel Beattie of the University of Southern California, found that the poor readers performed significantly worse than the control group only when there were high levels of background noise.

The two groups performed comparably at the prescribed task when there was no background noise and when the stimulus set size was varied, either a large or a small set size.

According to Dr. Beattie, "these findings support a relatively new theory, namely that dyslexic individuals do not completely filter out irrelevant information when attending to letters and sounds. This external noise exclusion deficit could lead to the creation of inaccurate representations of words and phonemes and ultimately, to the characteristic reading and phonological awareness impairments observed in dyslexia."

Source-Eurekalert

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