Journal article
Thumb's rule tested: visual angle of thumb's width is about 2 deg
Perception, Vol.20(3), pp.415-418
1991
Abstract
Measures of the size of various hand parts and their viewing distance when held at arm's length were made on one hundred and eighteen undergraduate students. A simple rule of thumb can be confirmed: Visual angle of the width of the thumb held at arm's length is about 2 deg. The thumbnail subtends about 1.5 deg and the index fingernail about 1 deg in width, when both are held at arm's length. These figures are good approximations for males and females, although a significant, direct, linear relationship exists between hand-part size and the visual angle of the part at arm's length.
Details
- Title
- Thumb's rule tested: visual angle of thumb's width is about 2 deg
- Authors/Creators
- R.P. O'Shea (Author/Creator)
- Publication Details
- Perception, Vol.20(3), pp.415-418
- Publisher
- Pion
- Identifiers
- 991005543338507891
- Murdoch Affiliation
- School of Psychology and Exercise Science
- Language
- English
- Resource Type
- Journal article
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- 8.19 Oceanography, Meteorology & Atmospheric Sciences
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- Web Of Science research areas
- Ophthalmology
- Psychology
- Psychology, Experimental
- ESI research areas
- Psychiatry/Psychology