(Schwellenwage nach von Frey.)
Description: This is, in essence, also an esthesiometer, or
device for measuring sensitivity to touch. This device is
specifically designed for method of average error threshold
measurement, i.e., continuously adjustable stimulus, the response
which (the threshold) can be easily read. A pin made of horn is
attached to a lever, which provides the source of touch. The
screw S provides variation of the weight applied, and the
pressure applied is read from the scale attached to the lever, K.
(Expanded caption Copyright 1998, Edward J. Haupt)
(Source: Frey, v. (1896). Abhandlungen der Königliche
Sächsische Gesellschaft der Wissenschaften, 23, 188-.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis-
Liste über psychologische und physiologische Apparate
(p. 116). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: Measurement apparatus
Stimulus: Touch
System: Touch
Output: Pressure