Abstract

The purpose of this research was to investigate the effect of adding various luminances of monochromatic light to a wavelength-discrimination target. As the additive luminance was increased, the size of the discrimination step increased. With a 650-nm added field, the wavelength-discrimination functions showed asymmetrical displacement, with comparatively little change for wavelengths below 480 nm. With a 435-nm addition, the wavelength-discrimination steps increased for all wavelengths. With a 578-nm addition, they increased in the spectral region 500–600 nm.

© 1970 Optical Society of America

Wavelength Discrimination Measured with Square-Wave Gratings*

R. Hilz and C. R. Cavonius
J. Opt. Soc. Am. 60(2) 273-277 (1970)

Effect of Luminance-Matched Wavelength on Depth Discrimination at Scotopic and Photopic Levels of Target Illumination

WILLIAM O. DWYER and ALFRED LIT
J. Opt. Soc. Am. 60(1) 127-131 (1970)

Variables Determining Flicker Sensitivity in Small Fields*

Ulker Tulunay Keesey
J. Opt. Soc. Am. 60(3) 390-398 (1970)

Small-Field Chromaticity Discrimination*

David L. MacAdam
J. Opt. Soc. Am. 49(12) 1143-1146 (1959)

Chromatic Contrast and Visual Sensitivity: Evidence for Disparate Mechanisms*

Charles E. Sternheim
J. Opt. Soc. Am. 60(5) 694-699 (1970)