Brightness discrimination in the harbor seal (Phoca vitulina)
Författare
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.
Avdelning/ar
Publiceringsår
2008
Språk
Engelska
Sidor
96-103
Publikation/Tidskrift/Serie
Vision Research
Volym
48
Issue
1
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Zoology
Nyckelord
- brightness discrimination
- harbor seal
- animal psychophysics
- contrast
Status
Published
Forskningsgrupp
- Lund Vision Group
ISBN/ISSN/Övrigt
- ISSN: 1878-5646