L. E. Marks, Percept. Psychophys. 9, 26 (1971).
C. A. Padgham, Vision Res. 11, 577 (1971).
D. Yager, Vision Res. 10, 521 (1970).
S. S. Stevens, in Handbook of Sensory Physiology, edited by W. R. Loewenstein (Springer, Berlin, 1971), Vol. 1, Ch. 7.
S. M. Newhall, R. W. Burnham, and J. R. Clark, J. Opt. Soc. Am. 47, 43 (1957).
J. W. T. Walsh, Photometry (London, Constable, 1958), p. 203.
L. W. Marks and J. C. Stevens, Percept. Psychophys. 1, 17 (1966); Percept. Psychophys. 4, 315 (1968).
The data shown in the figures may be obtained in tabular form from the authors, or from the National Auxiliary Publications Service, c/o Microfiche Publications, 305 East 46 Street, New York, N.Y. 10017.
G. Ekman, Studium Generale 16, 54 (1963).
Essentially the same mean sensitivity data can be obtained from the group-brightness-estimation plots (Fig. 1). However, the low-luminance ends of these functions are distorted because some observers' slopes change in this region whereas others do not. To be certain that our criterion fell on thc main part of each observer's estimation function, we first obtained each individual's spectral sensitivity function and then took the mean of these individual functions.
Y. Hsia and C. H. Graham, Proc. Natl. Acad. Sci. USA 38, 80 (1952).
H. G. Sperling and Y. Hsia, J. Opt. Soc. Am. 47, 707 (1957).
B. C. Wilson, Ph.D. thesis, New York University (1964). Cited by D. H. Krantz, in Handbook of Sensory Physiology, Vol. VII/4, edited by D. Jameson and L. M. Hurvich (Springer, Berlin, 1972), p. 678.
S. L. Guth, in Color Metrics, edited by J. J. Vos, L. F. C. Friele, and P. L. Walraven (AIC/Holland, Soesterberg, 1972).