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See also:PSYCHOPHYSICS (from Gr. ifivXil, soul, 4uvcs, nature) , a See also:department of See also:psychology which deals with the physiological aspects of See also:mental phenomena, and in particular investigates the quantitative relations between stimuli and the resultant sensations. Following the introspective school of which the last See also:leader was See also:Alexander See also:Bain, the tendency of psychological investigation, in the hands of See also:Fechner, See also:Helmholtz, See also:Wundt, See also:Munsterberg, was predominantly psychophysical, and psycho-logical study, especially in See also:Germany, where the first fully-equipped laboratory was set up in See also:Leipzig (1879) by Wundt, and in See also:America became largely a See also:matter of experiment and apparatus. Such apparatus has been devised for See also:optical, acoustical, haptical (Gr. Cis-rev, See also:touch), See also:taste and See also:smell experiments. Haptical apparatus includes the kinesimeter (for cutaneous sensation), the thermaesthesiometer (for See also:heat and See also:cold sensation), the algometer or algesimeter (for See also:pain sensations), the aesthesiometer (e.g. those of Jastrow and Munsterberg). Among important apparatus for measuring the See also:- TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
- TIME, MEASUREMENT OF
- TIME, STANDARD
time relations of mental processes are the d'See also:Arsonval chronometer, which marks hundredths of a second, and the Hipp chronoscope, in which the stimulus and, the See also:clock are electrically connected.
For authorities see See also:Baldwin's Dict. of Philos. and Psych. s.v. " Laboratory," and the latest psychological textbooks.
End of Article: PSYCHOPHYSICS (from Gr. ifivXil, soul, 4uvcs, nature)
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