Navon figure

Navon figure

A Navon figure is made of a larger recognisable shape, such as a letter, composed of copies of a smaller different shape. Navon figures are used in tests of visual neglect.[1]. David Navon's research demonstrated that global features are perceived more quickly than local features.[2] Jules Davidoff also performed research, but in a remote culture, finding opposite results; the participants more readily identified the local features.[3] Patients with Simultanagnosia have difficulty identifying global features, and when presented with a Navon figure will identify only the local features.[4] In a recent study comparing global-local processing in different races [5], it was found that East Asians demonstrated significantly stronger global processing than Caucasians, implying that in terms of research on visual attention, race should be acknowledged in order to come to valid theoretical conclusions.

Example

A letter T (global)composed of letter S

 SSSSSSSSSSSSSSSSSSSSSSSSS
 SSSSSSSSSSSSSSSSSSSSSSSSS
 SS        SSSSS        SS
           SSSSS
           SSSSS
           SSSSS
           SSSSS
           SSSSS
           SSSSS
          SSSSSSS
       SSSSSSSSSSSSS

See also

References

  1. ^ Assessing Attention in Unilateral Neglect, http://ahsmail.uwaterloo.ca/~aktse/assessment.html 
  2. ^ Navon, 1977 cited in (1)
  3. ^ Davidoff, J.; E. Fonteneau, J. Fagot (Sep. 2008). "Local and global processing: Observations from a remote culture". Cognition 108 (3): 702–709. doi:10.1016/j.cognition.2008.06.004. 
  4. ^ Simultanagnosia, 2009, http://joeltalks.com/index.php?p=1_16 
  5. ^ McKone, E.; Davies, A.A., Fernando, D., Aalders, R., Leung, H., Wickramariyaratne, T., Platow, M.J. (July 2010). "Asia has the global advantage: Race and visual attention.". Vision Research 50 (16): 1540–1549. doi:10.1016/j.visres.2010.05.010. 
  • Nature Neuroscience 9, 740 - 742 (2006) Published online: 14 May 2006 | doi:10.1038/nn1709
  • David Navon, Forest before trees: The precedence of global features in visual perception Cognitive Psychology Volume 9, Issue 3, July 1977, Pages 353-383

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