The cats-and-dogs test : a tool to identify visuoperceptual deficits in Parkinson's disease

Weil, Rimona S. and Pappa, Katerina and Schade, Rachel N. and Schrag, Anette E. and Bahrami, Bahador and Schwarzkopf, Dietrich S. and Crutch, Sebastian J. and O'Keeffe, Aidan G. and Morris, Huw R. (2017) The cats-and-dogs test : a tool to identify visuoperceptual deficits in Parkinson's disease. Movement Disorders, 32 (12). pp. 1789-1790. ISSN 0885-3185 (https://doi.org/10.1002/mds.27176)

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Abstract

There are no robust features to predict which patients with Parkinson’s disease (PD) will develop dementia. Those with involvement of visual processing regions are at highest risk of dementia.1-3 However, current measures of visuoperception are poorly sensitive.4 We have developed a sensitive test of visuoperception based on the clinical observation that patients with PD have difficulty reading distorted CAPTCHA (completely automated public Turing test to tell computers and humans apart) images

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