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Brightness discrimination in the harbor seal (Phoca vitulina)

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Author

Summary, in English

The brightness discrimination ability of a mate harbor seal was investigated at an ambient illumination of 0.9 lx. The visual stimuli consisted of circular gray discs that were presented on a black background on a TFT monitor. Eight standard intensities were tested against sets of lower comparison intensities. In accordance with Weber's law we observed a constant gain of the just noticeable intensity difference with increasing intensity of the standard stimulus. The calculated Weber fraction is 0.14. This result indicates that the brightness discrimination ability of the harbor seal is comparable to that of humans.

Publishing year

2008

Language

English

Pages

96-103

Publication/Series

Vision Research

Volume

48

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Zoology

Keywords

  • brightness discrimination
  • harbor seal
  • animal psychophysics
  • contrast

Status

Published

Research group

  • Lund Vision Group

ISBN/ISSN/Other

  • ISSN: 1878-5646