Abstract

Thresholds for discriminating chromatic pulses are elevated when the discriminations are made at a locus differing from that to which the observer is adapted. Our previous results were equivocal with regard to the hypothesis that the threshold elevating processes operate independently within the "cardinal mechanisms." The results suggested that performance, in some cases, was improved by the utilization of information from additional mechanisms similar to those postulated by Hurvich and Jameson. We will present results of experiments on the detection of pulses at loci removed from the adaptation locus designed to eliminate the influence of the additional mechanisms.

© 1992 Optical Society of America