The data from experiments in magnitude estimation of discomfort glare and loudness are reported. A distribution of stimuli and judgments was used which allowed a check for the internal consistency of the magnitude estimations. An interval interpretation of the resulting scales for glare and loudness was found to be more compatible with the consistency checks than was a ratio interpretation. The interval scales were nicely fit by power functions of the form R = aSn + b. The scale for glare represents a first approximation to a usable scale for discomfort glare different from the typical brightness scale.
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References
1.
CurtisD. W.Magnitude estimations and category judgments of brightness and brightness intervals: A two-stage interpretation. Journal of Experimental Psychology, 1970, 83, 201–208.
2.
EkmanG.Is the power law a special case of Fechner's Law?Perceptual and Motor Skills, 1964, 19, 730.
3.
GarnerW. R.Advantages of the discriminability criterion for a loudness scale. Journal of the Acoustical Society of America, 1958, 30, 1005–1012.
4.
PoultonE. C.The new psychophysics: Six models for magnitude estimation. Psychological Bulletin, 1968, 69, 1–19.
5.
RossJ.DilolloV.Judgment and response in magnitude estimation. Psychological Review, 1971, 78, 515–527.
6.
StevensS. S.Cross-modality validation of subjective scales for loudness, vibration, and electric shock. Journal of Experimental Psychology, 1959, 57, 201–209.
7.
StevensS. S.The psychophysics of sensory function. In RosenblithW. A. (Ed.), Sensory communication. Cambridge: M. I. T. Press, 1961. Pp. 1–33.
8.
StevensS. S.GrbenbaumH. B.Regression effect in psychophysical judgment. Perception and Psychophysics, 1966, 1, 439–446.
9.
WardL. M.Some psychophysical properties of category judgments and magnitude estimations. Unpublished doctoral dissertation, Duke Univer., 1971.
10.
WardL. M.Category judgments of loudnesses in the absence of an experimenter-induced identification function: Sequential effects and power function fit. Journal of Experimental Psychology, 1972, 94, 179–184.
11.
WarrenR. M.WarrenR. P.A critique of S. S. Stevens' “New psychophysics.”Perceptual and Motor Skills, 1963, 16, 797–810.
