A comparison of effectiveness of two hemisphere training on reading and comprehension of visual and auditory types of dyslexic students

The effectiveness of neuropsychological therapeutic methods on neurodevelopmental disorders, including dyslexia, has been reviewed in many researches. the effectiveness of neuropsychological treatment methods on reducing dyslexia subtypes problems have been less studied. The objective of present research was to study the effectiveness of two-hemisphere training on reading and comprehension of visual and auditory types of dyslexic students. In this study an accessible sample was used. Using semi-experimental method and pretest-posttest design with control group, 40 elementary students in grades two and three from waiting lists of two learning disorders center in Tehran were selected and from this population, according to scores obtained in, verbal comprehension and perceptual reasoning indexes of Wechsler test-fourth edition (Wechsler, 2003), 20 students were identified as visual dyslexic and 20 students as auditory dyslexic. Then 10 students were included randomly in experimental and 10 students in control groups. Experimental groups were exposed to 16 training sessions and control groups didn’t receive any training. Before and after training, (NEMA) dyslexia test (Moradi & Kormmi Nouri, 2008), was performed for all groups. In order to analyze test results, multivariate covariance analysis test was utilized. Results suggest that posttest scores of experimental groups in reading and comprehension increased significantly (0.05 level of significance) two-hemisphere training was effective on reading and comprehension of both types of dyslexia.