Abstract

Rayleigh matches gathered with anomaloscopy have been used to study polymorphisms of human cone photopigments and causes of acquired color vision defects. Anomaloscopy typically requires a skilled and trained tester following a standard protocol. The endpoints of the matching range can be readily determined if the responses of the observer are consistent, but if the observer gives varying responses to the same mixture then the tester must develop decision criteria to determine the matching range endpoints. Since the number of trials is small, it is not possible to quantify response variability. These factors reduce test-retest reliability and introduce a source of test site dependence for Rayleigh match data.

© 1992 Optical Society of America