Y. Okamoto@Psy.JWU
Japan Women’s University
Journal (Faculty of Integrated Arts and Social Sciences), Vol. 15 (2004),
107-121
Generalization of
Fechner’s Approach
YASUHARU OKAMOTO
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Abstract Generalization of Fechner’s assumptions, Weber’s Law and constancy of subjective JNDs, are proposed to be included in deriving sensory scales, and the role of variance of sensation intensity is emphasized. Today, Weber’s Law is accepted as an approximate one and its generalizations, the generalized Weber’s law or the near-miss to Weber’s law, are well known. Constancy of subjective JNDs seems to hold without questions, but this assumption presupposes constancy of variance of sensation intensity. Ekman’s law denies equality of subjective JNDs. Differential equation, which is introduced in this paper, includes these generalizations of the two basic Fechnerian assumptions to relate them to sensory scale. |
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(A note from the paper) Note (i) In 1995, Colonius read one of earlier versions of my manuscript on the model discussed here. From 1994 to 1995, R. D. Luce also gave me stimulating comments on the earlier version of the model discussed here (see Okamoto, 2001, pp. 7-8). |
Correspondence may be addressed to Y. Okamoto (e-mail: okamotoy@fc.jwu.ac.jp)