Dot cancellation test

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The Dot cancellation test or Bourdon-Wiersma test is a commonly used test of combined visual perception and vigilance.[1][2]

The test has been used in the evaluation of stroke where subjects were instructed to cross out all groups of 4 dots on an A4 paper. The numbers of uncrossed groups of 4 dots, groups of dots other than 4 crossed, and the time spent (maximum, 15 minutes) were taken into account.[2] 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.[3][4]

The test is based on the work of French psychologist Benjamin B. Bourdon (1860–1943) and Dutch neurologist Enno Dirk Wiersma (nl) (1858–1940).[5][6]


  1. ^ Laursen, Peter. "Functions and Parameterization". Cognitive Function Scanner. Retrieved 1 March 2011. 
  2. ^ a b Akinwuntan AE, De Weerdt W, Feys H, Baten G, Arno P, Kiekens C (March 2005). "The validity of a road test after stroke". Arch Phys Med Rehabil. 86 (3): 421–6. PMID 15759222. doi:10.1016/j.apmr.2004.04.047. 
  3. ^ "Group-Bourdon tool". Digital Reality. Retrieved 2 March 2011. 
  4. ^ Nijenhuis, J; Vanderflier, H (19 July 2002). "The correlation of g with attentional and perceptual-motor ability tests". Personality and Individual Differences. 33 (2): 287–297. doi:10.1016/S0191-8869(01)00152-0. 
  5. ^ Ono H, Lillakas L, Kapoor A, Wong I, 2013, "Replicating and extending Bourdon’s (1902) experiment on motion parallax" Perception 42(1) 45 – 59
  6. ^

Further reading[edit]

Grewel, F (October 1953). "The Bourdon-Wiersma test.". Folia psychiatrica, neurologica et neurochirurgica Neerlandica. 56 (5): 694–703.