Citation

Solomon JA. Vision Res. 2007; 47(26): 3247-3258.

Affiliation

Department of Optometry and Visual Science, City University, London EC1V 0HB, UK. J.A.Solomon@city.ac.uk

Copyright

(Copyright © 2007, Elsevier Publishing)

DOI

10.1016/j.visres.2007.09.006

PMID

17961625

PMCID

PMC2386851

Abstract

To explain the relationship between first- and second-response accuracies in a detection experiment, Swets, Tanner, and Birdsall [Swets, J., Tanner, W. P., Jr.,&Birdsall, T. G. (1961). Decision processes in perception. Psychological Review, 68, 301-340] proposed that the variance of visual signals increased with their means. However, both a low threshold and intrinsic uncertainty produce similar relationships. I measured the relationship between first- and second-response accuracies for suprathreshold contrast discrimination, which is thought to be unaffected by sensory thresholds and intrinsic uncertainty. The results are consistent with a slowly increasing variance.

Language: en