Fechnern.

1874 J. Sully Sensation & Intuition 62 Fechner's law accurately defines this relation.

1876 Mind 1 455 It is thus quite possible to give a physical interpretation to Fechner's law without implying anything ‘inconceivable’.

1887 G. T. Ladd Elem. Physiol. Psychol. v. 366 The significant addition which Fechner has made to Weber's law consists in the assumption that all just observable differences are equally great. It is therefore also called ‘Fechner's law’.

1892 C. C. Van Liew & O. Beyer tr. T. Ziehen Introd. Physiol. Psychol. 54 The logarithmic formula of Fechner's Law.

1892 C. C. Van Liew & O. Beyer tr. T. Ziehen Introd. Physiol. Psychol. 55 The undoubted advantage of being able to explain or account for Fechner's Formula entirely in accordance with the spirit of the natural sciences.

1909 C. S. Myers Text-bk. Exper. Psychol. 86 When a white sector upon a black ground is very slowly turned on the colour wheel, a series of black bands in the form of radii may be observed on that part of the white surface which first stimulates the eye... With somewhat more rapid rotation, especially under bright illumination, various colours, called Fechner's colours, may be visible on the white surface.

1931 Brit. Jrnl. Psychol. July 19 Phenomenal Regression and Fechner's Difference Law... This law..is that if a − b = b − c, then A/B = B/C..if a − b represents the sense distance corresponding to the presentation of the stimulus A with B, and b − c the sense distance similarly resulting from the stimuli B and C.

1951 S. H. Bartley in S.S. Stevens Handbk. Exper. Psychol. 981/2 Fechner's paradox is the sensory result when two eyes are independently exposed to unequal amounts of light.

1970 C. W. Savage Measurement of Sensation viii. 298 Until it is shown that the nature of sensations and the nature of measurement make such a discovery impossible, we cannot conclude that Fechner's law is meaningless.