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The Concept and the Task of Psychophysics
Concepts concerning Sensation and Stimulus
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able according activity afterimages appears average error body calculated changes color compared conservation of energy constant errors corresponding depends determined deviations differential sensitivity discussion E. G. Boring E. H. Weber effect equal experimental experiments extensive sensations extent external fact fatigue Fechner geometric series given hand heavier hemeralopia illumination increase influence inner psychophysics intensity intrinsic light investigation irradiation judgment kinetic energy Leipzig lifted limits magnitude mathematical means ments method of average method of right Methods of Measurement micrometer noticeable differences number of right number right perceived perception photometric physical position potential energy procedure proportional psychic psychology psychophysical processes pulse rate ratio relationship respect retina right and wrong Rochon prism sound intensities standard weight stellar magnitudes stimulus difference stimulus increments temperature tion validity values variable vibrations viewing distance visual angle Volkmann Weber's Law weight lifts