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1 results

  • Simple reaction time as a measure of global attention in Alzheimer's disease

  • Mary Sano, Wilma Rosen, Yaakov Stern, Jeffrey Rosen, Richard Mayeux
  • Journal:
    Journal of the International Neuropsychological Society / Volume 1 / Issue 1 / January 1995
    Published online by Cambridge University Press:
    26 February 2009, pp. 56-61

  • Alzheimer's disease (AD) is characterized by progressive decline in memory, language and other cognitive functions. Deficits in attentional processes have also been suggested. A simple reaction time (RT) task was used to assess global attention in AD. The length and consistency of a warning signal given prior to the response stimulus were manipulated to determine if patients with AD and age-matched controls benefit from predictability in RT tasks. Overall reaction time was slower in the AD group than in the and control group. Both groups demonstrated significant improvement in RT with long warning signals compared to short warning signals, but only the control group benefited from the consistency of the warning. (JINS, 1995, I, 56–61.)