Dot cancellation test

{{short description|Visual perception and vigilance test}}

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| name = Dot cancellation test

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|purpose= test visual perception

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| synonyms = Bourdon-Wiersma test

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The dot cancellation test or Bourdon–Wiersma test is a commonly used test of combined visual perception and vigilance.{{cite web|last=Laursen|first=Peter|title=Functions and Parameterization|url=http://www.crs.dk/function.html|work=Cognitive Function Scanner|access-date=1 March 2011}}

The test has been used in the evaluation of stroke where subjects were instructed to cross out all groups of four dots on an A4 paper. The numbers of uncrossed groups of four dots, groups of dots other than four crossed, and the time spent (maximum, 15 minutes) were taken into account.{{cite journal |vauthors=Akinwuntan AE, De Weerdt W, Feys H, Baten G, Arno P, Kiekens C |title=The validity of a road test after stroke |journal=Arch Phys Med Rehabil |volume=86 |issue=3 |pages=421–6 |date=March 2005 |pmid=15759222 |doi=10.1016/j.apmr.2004.04.047 }} The Group–Bourdon test, a modification of the Bourdon–Wiersma, is one of a number of psychometric tests which trainee train drivers in the UK are required to pass.{{cite web|title=Group–Bourdon tool|url=http://www.digital-reality.org.uk/|publisher=Digital Reality|access-date=2 March 2011|archive-url=https://web.archive.org/web/20110103204755/http://www.digital-reality.org.uk/|archive-date=3 January 2011|url-status=usurped}}{{cite journal|last=Nijenhuis|first=J|author2=Vanderflier, H|title=The correlation of g with attentional and perceptual-motor ability tests|journal=Personality and Individual Differences|date=19 July 2002|volume=33|issue=2|pages=287–297|doi=10.1016/S0191-8869(01)00152-0}}

The test is based on the work of French psychologist Benjamin B. Bourdon (1860–1943) and Dutch neurologist {{illm|Enno Dirk Wiersma|nl}} (1858–1940).Ono H, Lillakas L, Kapoor A, Wong I, 2013, "Replicating and extending Bourdon’s (1902) experiment on motion parallax" Perception 42(1) 45 – 59[http://universal_lexikon.deacademic.com/216409/Bourdon-Test Bourdon test definition]