preview

Phonological Impairment

Good Essays

Within current research, it is acknowledged that phonological impairment may result in dyslexia. A study by Lobier, Zoubrinetzky, and Valdois (2012) suggests that while phonological impairment may be the root cause in some dyslexic patients, visual processing deficits may play a significant role in dyslexia, especially in patients without phonological difficulties. More specifically, the research aimed to support the hypothesis that the “underlying impairment responsible for the VA span deficit is visual, not verbal” (2012, p. 768). To support the hypothesis, the study was designed to compare the performance of typically-developing children and dyslexic children on visual attention span tasks with verbal and non-verbal stimuli. Non-verbal stimuli were included to demonstrate the absence of …show more content…

The hypothesis that there is a significant visual component in dyslexia was supported by the research findings and furthermore, is echoed in current developmental dyslexia literature. The study found that dyslexic children had poorer performance on categorization tasks (letters, digits, and symbols) for both verbal and non-verbal stimuli. However, the study was limited and contradictory in some findings and demonstrates a need for further research to investigate such areas. Specifically, future research must address symbol processing and compare performance of typically-developing children to dyslexic children. Lobier, Zoubrinetzky, and Valdois (2012) found that children with developmental dyslexia demonstrated deficits in symbol processing compared to normal counterparts, while Ziegler et al. (2010) found that typically-developing children and dyslexic children had equal performance on symbol processing tasks. Additionally, future dyslexia research could include variables such as crowding effects and binocular vision involvement to address other visual components that may be involved with dyslexia

Get Access