QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY. Elements of Psychophysics, Volume I. By Gustav Fechner. Translated by Helmut E. Adler. Elements of Psychophysics, Volume 1. Front Cover. Gustav Theodor Fechner. Holt, Rinehart and Winston, QR code for Elements of Psychophysics. Download Citation on ResearchGate | Elements of psychophysics. Vol. Contains historical introductions on the life of Fechner by E. G. Boring and by H. E. Adler.

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Though he had a vast influence on psychophysicsthe actual disciples of his general philosophy were few.

Elements of Psychophysics | work by Fechner |

My library Help Advanced Book Search. In his Vorschule der Aesthetik he used the method of extreme ranks for subjective judgements.

From Wikipedia, the free encyclopedia. Concepts concerning Sensation and Stimulus. And yet a great advantage would be lost, if so simple a law as Weber’s law could not be used as an exact or at least sufficiently approximate basis for psychic measurement; just such an advantage as would be lost if we could not use the Kepler law in astronomy, or the laws of simple refraction in the theory of the dioptric instruments.

We will return to this statement in a special chapter chapter 18 since it is of great importance, and perhaps not directly evident to everyone. These are nevertheless for the present merely opinions and expectations, the verification of which lies in the future.

Retrieved from ” https: Philosophers speak of God.

Holt, Rinehart and Winston- Psychology, Experimental – pages. Thus, for example, the following numbers and logarithms belong together:. Inasmuch as this is not a matter of direct experience it must be deduced by some exact method.

Indeed it is possible for this entire investigation to proceed along exact lines, and it cannot fail at some time or other to obtain the success of a critical study, if one has not already reached that goal. The dependence, quantitatively considered of sensation on stimulus, must finally be translated into one of sensation on the bodily processes which directly underlie the sensation — in short the psycho-physical processes; and the sensation, instead of being measured by the amount of the stimulus, will be measured by the intensity of these processes.


Gustav Theodor Fechner and his Psychophysical Worldview. The measurement formula is founded upon Weber’s law and the fact of the stimulus threshold; and both must follow in turn from it. For the present I shall not let it detain me longer. Carl Stumpf was a participant in this study. Naturally all deduction from Weber’s law and the fact of the threshold will also be deductions from our measurement formula. Whether Fechner and Benham ever actually met face to face for any reason is not known.

Meanwhile it is not the most general formula that can be derived, but one which is only valid under the supposition of particular units of sensation and stimulus, and we still need a direct and absolute deduction instead of the indirect and approximate one.

Gustav Fechner

The specialist sees at once how this may be attained, namely, by treating the fundamental formula as a differential formula and integrating it. Hegel and the monadism of Rudolf Hermann Lotze. In the former case, when the sensation reaches its lower threshold; in the latter case, when it becomes so great that a given stimulus increase is barely noticed.

For as one can easily convince oneself, either from theory or from the psychophysocs, the logarithm does not increase by equal increments when the corresponding number increases by equal increments. History Philosophy Portal Psychologist. A Source Book in the History of Psychology pp.

Elements of Psychophysics – Gustav Theodor Fechner – Google Books

According to the rule, that the logarithm of a quotient of two numbers may be substituted for the difference of their logarithms, The most famous outcome of his inquiries is the law known as the Ellements law which may be expressed as follows:.

By psychophysivs this site, you agree to the Terms of Use and Privacy Policy. This is Weber’s law. If one doubles or triples the value of the variation d b without changing the initial value bthen the value of the change d g is also doubled or tripled.

The most general and more fundamental basis for psychic measurement is rather those methods by which the relation between stimulus increments and sensation increment in general is determined, within, as well as psjchophysics, the limits of Weber’s law; and the development of these methods towards even greater precision and perfection is the most important consideration in regard to psychic measurement. When the number 10 is increased by 10, that is, reaches 20the logarithm corresponding to 10, which is 1, is increased to 1.


The determination of psychic measurement is a matter for outer psychophysics and its first applications lie within its boundary; its further applications and consequences, however, extend necessarily into the domain of inner psychophysics and its deeper meaning lies there. Elements of PsychophysicsVolume 1. The sensation begins with values above zero, not with zero, but with a finite value of the stimulus — the threshold; and so does the logarithm begin with values above zero, not with a zero value of the epements, but with a finite value of the number, the value I, inasmuch as the logarithm of 1 is equal to zero.

One can readily see, that the relation between the increments d g and d b in the fundamental formula corresponds to the relation between the increments of a logarithm and the increments of the corresponding number.

This is the mathematical principle. He also uses K in the equation later in this same paragraph, but kappa repeatedly later in the section. In fact such a law, as well as Weber’s law, will furnish a differential formula from which may be derived an integral formula containing an expression for the measurement of sensation. There is, however, another formula connected with this formula by infinitesimal calculus, which expresses a general quantitative relation between the stimulus magnitude as a summation of stimulus increments, and the sensation magnitude as a summation of sensation increments, in such a way, that with the validity of the first formula, together with the assumption of the fact of limen, the validity of this latter formula is also given.

In each instance the increase in the logarithm is 0.