Saturday, December 29, 2007

Mental timing and dyslexia - another study

Another article (Jamkowski & Rusiak, 2008; Psychological Research journal) investigating the role of temporal processing in reading and reading disabilities (click here for prior related posts). The literature review (intro) is worth a read just to get a quick overview of the potential role of temporal processing in a number of clinical disorders and human cognitive functioning.

(italics added by the Time Doc blog dictator)
  • Hari et al. (Brain 174:1373–1380, 2001) demonstrated that dyslexics showed a sluggish attention capture in both visual hemiWelds. Additionally, they indicated a left–right asymmetry in the perception of temporal order of two visual stimuli (they performed worse than controls only if the stimulus in the left hemiWeld preceded that in right hemiWeld). They suggested that a left-sided minineglect is associated with dyslexia. We hypothesized that if a kind of neglect syndrome is responsible for the asymmetry they found, dyslexics should not only show a left–right asymmetry in temporal order judgment of two laterally presented stimuli but also perform equally well as controls when the stimuli are vertically aligned. Our results indicated that in both tasks dyslexics performed generally worse than normal readers. The results suggest that dyslexics suffer from a more general problem of order discrimination.

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