Experiments with two odorants, acetic acid and propionic acid, have provided additional evidence that jnds are a constant fraction of the stimulus strength. A linear plot of the difference limens and stimulus intensities has yielded a K of 0.28 for olfactory discrimination in man. The treatment of data derived from tests above the 50% limen and the over-all concept of jnd discrimination are discussed.
GouldenC. H.Methods of statistical analysis. New York: Wiley, 1956.
3.
GuilfordJ. P.Psychometric methods. New York: McGraw-Hill, 1954.
4.
JonesL. V.Methodology of preference measurement. Chicago: Quartmstr. Food & Container Institute, 1957. (Rep. No. DA19-129-QM-774, P-1101)
5.
MillerG. A.Sensitivity to changes in the intensity of white noise and its relation to masking and loudness. J. Acoust. Soc. Amer., 1947, 19, 609–619.
6.
MillerG. A., & GarnerW. R.Effect of random presentation on the psychophysical function: implications for a quantal theory of discrimination. Amer. J. Psychol., 1944, 57, 451–467.
7.
MrakV. G.AmerineM. A.OughC. S., & BakerG. A.Odor difference test with applications to consumer preference. Food Res., 1959, 24, 574–578.
8.
OughC. S., & StoneH.An olfactometer for rapid and critical odor measurement. J. Food Sci., 1961, 26, 452–456.
9.
StoneH.Determination of odor difference limens for three compounds. J. exp. Psychol., 1963, 66, 466–473.
10.
StoneH.Behavioral aspects of absolute and differential olfactory sensitivity. Ann. N. Y. Acad. Sci., 1964, 116, 527–534.
11.
StoneH.OughC. S., & PangbornR. M.Determination of odor difference thresholds. J. Food Sci., 1962, 27, 197–202.
12.
WenzelB. M.Differential sensitivity in olfaction. J. exp. Psychol., 1949, 39, 129–143.
