| Literature DB >> 18078667 |
Christine Scholtyssek1, Almut Kelber, Guido Dehnhardt.
Abstract
The brightness discrimination ability of a male harbor seal was investigated at an ambient illumination of 0.9lx. 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.Entities:
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Year: 2007 PMID： 18078667 DOI： 10.1016/j.visres.2007.10.012
Source DB: PubMed Journal: Vision Res ISSN： 0042-6989 Impact factor: 1.886