ELEMENTS the PSYCHOPHYSICS 01 English Gustav Theodor Fechner.pdf

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a) sense of sight
Special regulations for the smallest identifiable quantities
Special provisions for the smallest recognizable distances.
a ) Two Distant Points
b ) Two Distant Threads
g ) Streaky and dicey figures
Behavior of the side parts of the retina in recognizing the smallest sizes and
distances Distance
differences (eye size
b) sense of touch
c) perception of time and movement
XII. Parallel Law to Weber's Law.
1) weight tests
2) experiences in the field of sensation of light
3) experiments in the field of extensive sensation
XIII. Laws of Mixture Phenomena

Foreword by the author of the first edition.
By psychophysics I mean, according to the explanation given in more detail in the
second chapter, a doctrine which, although age-old, yet presents itself as a new one
with regard to the formulation and treatment of this problem, that the new name is not
inappropriate and not unnecessary, in short an exact teaching of the relationship
between body and soul.
As exact teaching, psychophysics, like physics, must be based on the experience
and mathematical connection of experiential facts which require a measure of what is
required of experience, and, if such is not yet available, seek it. Now that the measure
of the physical quantities has already been given, the first and chief task of this
writing will be the determination of the measure of the psychical magnitudes, where
it had hitherto been absent; the second to address the applications and designs that tie
in with it.
It will be shown that the determination of the psychic measure is not a mere matter
of the study table or philosophical apercus, but requires a broad empirical
basis. These I believe to have given sufficiency here, to the extent that the principle
of measure is certain, but so far from the applications, that the utility of this measure
will also be recognized. But the empirical basis for the development of the
psychophysical doctrine requires great expansion, and what is given by the
applications only reveals that without comparison there will be more.