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apparent approximately asked attribute average basilar membrane bisection brightness category scale constant continua contours cross-modality matching curvature curve decibels Fig density determined equal loudness equisection example experimental experiments Fechner frequency geometric mean hertz hysteresis increases increment intervals intramodal matching judged kind light logarithmic function logarithmic law luminance magnitude estimation magnitude production magnitude scale matching function measurement mel scale metathetic monaural nanometers neural observer's observers adjusted obtained order bias partition scale perceptual pitch plotted poikilitic function ponent power function power law predicted presented procedure produced prothetic continuum pure tones ratio scale regression effect relation relative represent Reprinted by permission response seems sensation sense modalities sensory sensory systems server shown in Fig slope exponent sones Sound pressure level standard stellar magnitude stimulus level stimulus range subjective threshold variability vibration virtual exponent visual wavelength Weber's law white noise words
Page 11 - Fechner's book was the starting point of a new department of literature, which it would be perhaps impossible to match for the qualities of thoroughness and subtlety, but of which, in the humble opinion of the present writer, the proper psychological outcome is just nothing.
Page vii - The reason for equating psychology to the problem of defining stimuli can be stated thus: the complete definition of the stimulus to a given response involves the specification of all the transformations of the environment, both internal and external, that leave the response invariant.
Page 18 - ... 1000 STIMULUS MAGNITUDE (Arbitrary Units) FIG. 3. Scales of apparent magnitude for three prothetic continua plotted in loglog coordinates. The slope of the line corresponds to the exponent of the power function governing the growth of the psychological magnitude. The same three functions shown in Figure 3 are plotted in linear coordinates in Figure 4. The function for apparent length is almost a straight line (exponent about 1.1), but electric shock grows as an accelerating function and brightness...
Page 299 - En admettant que ces lois et formules aient une valeur pour la psychophysique externe, elles ne peuvent être trans1. Etude psycho-physique. Recherches théoriques et expérimentales sur la mesure des sensations, et spécialement des sensations de lumière et de fatigue.