A Verification of Weber's Law for Visual Discrimination of Disc Sizes in the Bering Sea Spotted Seal, Phoca Largha.

摘要

Weber's Law applies to visual discrimination by spotted seals of discs of 0.96 -5.57 deg. A value was obtained for Weber's fraction of 0.026, which compares closely with the value of 0.029 reported for humans making visual line length discriminations. The likelihood of intensity discriminations contributing to these disc discrimination thresholds is low.