Psychonomic Science

, Volume 3, Issue 1–12, pp 67–68 | Cite as

Visual noise causes tunnel vision

  • Norman H. Mackworth
Perception and Performance


Ss had quickly to detect similarities between two uppercase letters presented peripherally and one other central letter falling on the fovea. These three characters were so legible that this task was very easy when the three letters were flashed on by themselves. But the addition of extra letters to this display seriously impaired performance. The periphery of the retina could no longer accurately detect at a glance whether items were similar. Foveal performance was also affected to some extent by extra items in the periphery of the retina.


Recognition Letter Noise Letter Visual Noise Tunnel Vision Central Letter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Psychonomic Press 1965

Authors and Affiliations

  • Norman H. Mackworth
    • 1
  1. 1.Harvard UniversityUSA

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