Overview

Landolt circle


Related Overviews

 

'Landolt circle' can also refer to...

 

More Like This

Show all results sharing this subject:

  • Psychology

GO

Show Summary Details

Quick Reference

A circle with a tiny part of its circumference missing, easily perceived as a circle in spite of the fact that it is not a closed curve, illustrating the closure grouping law and the phenomenon of Prägnanz. It is used mainly to test visual acuity, the respondent being shown a series of small differently oriented Landolt circles and asked to say where the gaps appear, choosing from alternatives such as twelve o'clock, three o'clock, six o'clock, and nine o'clock. Also called a Landolt C. [Named after the Swiss-born German physical chemist Hans Heinrich Landolt (1831–1910) who devised it]

Subjects: Psychology.


Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.