Abstract
Individual differences in classification of transient, isoluminant, chromatic signals were studied in 39 male subjects (age 29 ± 2.9 yr). Chromatic contrast was constrained to either R-G or B-Y axes of opponent color theory. Subjects binocularly and centrally fixated a light grey (D6500, 10.3 ft-L), 14° by 9.7° background. Stimuli uniformly replaced the central 7° by 6.5° of the background for 10.8 ms and had either low or high contrast with respect to it. Achromatic stimuli were also presented. Recorded data included two-alternative forced choice responses (based on stimulus hue) and event-related brain potentials (ERP). Five fifty-trial blocks were presented in the order: black/white (high con trast), R/Y (low contrast), B/Y (low), R/G (high), B/Y (high). Across subjects, corresponding mean percentages of correctly classified stimuli were (mean/sd): 92 ± 7, 72 ± 23, 26 ± 3, 91 ± 11, 71 ± 29. Across blocks, correlations of mean percent correct vs variables CIELUV ΔE, MacAdam's AS, N1-amplitude and P3-amplitude were 0.09, 0.45, 0.86, and 0.97.
© 1989 Optical Society of America
PDF ArticleMore Like This
Delwin T. Lindsey and Davida Y. Teller
THA3 OSA Annual Meeting (FIO) 1989
Bettina L. Beard, Dean Yager, Robert Rosenberg, David Horn, and James Thimons
WCC7 OSA Annual Meeting (FIO) 1989
Kenneth Knoblauch and Aries Arditi
ThB3 Applied Vision (AV) 1989