Duration related effects in reading performance in individuals with visual impairment

UoM administered thesis: Phd

  • Authors:
  • Chee Yong Kingsley Muk

Abstract

Recent evidence suggests that a decline in reading speed with time due to fatigue can be observed in an extended reading test, although only in individuals with a mild visual impairment. This effect could be relevant to the leisure reading ability in individuals with visual impairment. To date, there is no study investigating duration related effects in participants using low vision aids (LVA) for a reading task. This study aims to investigate if any negative duration related effects on the reading speed can be identified within a 15-minute reading test and whether the measurement parameters can predict the success of a LVA. The investigation was conducted in 26 young and 31 elderly normally-sighted adults, and 61 visually impaired participants. The normally-sighted participants were tasked to perform an approximately 15-minute silent reading task with habitual vision, with simulated loss of acuity and contrast sensitivity, and with the use of a hand-held magnifier. Reading slope was computed as the linear slope of the reading speed against time; NRR1 is the median ratio of the successive minutes reading speed relative to the reading speed at the second minute; and NRR2 is the ratio comparing the reading speed at the endpoint to the beginning of the reading test. A negative reading slope or NRRs of

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Original languageEnglish
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Award date1 Aug 2020