Transfer of lexical information in adults with reading disorders.
This study was designed to test whether adults with reading disorders differ from adults with normal reading abilities in their interhemispheric transfer rates during a lexical decision task. Correlations of performance were completed between lexical decision vocal reaction times (msec.), interhemispheric reaction rates (RVF vocal reaction times-LVF vocal reaction times) and measures of decoding skills, including sight word decoding and phonological decoding for 20 adults with reading disorders and 20 with normal reading abilities. Following a series of Pearson product-moment correlations, the correlation between interhemispheric transfer time and sightword recognition was significant and negative for the adults with reading disorders. This value indicates a significant association between the direction of the interhemispheric transfer time times and sight-word recognition for reading-disordered adults. When correlations were negative (LVF) reaction times < RVF reaction times), stronger sight-word recognition scores were found. The correlation between interhemispheric transfer time and sight-word recognition was not significant for the normal reading adults. For both groups, the correlations between interhemispheric transfer time and phonological decoding were not significant so an association between phonological decoding and interhemispheric transfer time was not evident, The current findings suggest a strong relationship between reading proficiency and reaction times in completing the lexical decision task for the reading-disordered adults.
Walker
M M
MM
Department of Communication Sciences and Disorders East Carolina University, Greenville, NC 27858-4353, USA. walkerm@mail.ecu.edu
D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology*; D004410:Dyslexia; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D011930:Reaction Time; D014794:Visual Fields / Q000502:physiology; D014825:Vocabulary