Bauhaus-Universität Weimar

24 
E. IV. Scripturei 
The next step was to eliminate the effect of strain on the finger. This 
was done by having the subject always react with a key of no tension ; 
the telegraph key was used in order not to introduce any further change. • 
The finger necessarily remained passive, as the key responded to the 
slightest movement. The subject reacted in alternate sets with two de¬ 
grees of voluntary effort. The degrees were defined as “light” and 
“strong; ” the intention was to make the effort correspond somewhat to 
the extremes of o and the heaviest weight in the previous set, but no 
measurements were made on the actual energy of effort. 
The results are given in Table V. 
Table V. 
Subject. 
1 ,ight effort. 
Strong effort. 
R 
d n 
R 
d n 
D 
Holden 
l5S 
IO 26 
143 
8 27 
15 
Scripture 
179 
16 17 
154 
19 18 
25 
Seashore 
168 
15 9 
137 
21 6 
31 
Fisher 
626 
25 S 
375 
4t 6 
241 
Unit, thousandth of a second. «, number of measurements. 
R, reaction-time. D, decrease in R for strong as compared 
d, mean variation. j with light effort. 
The figures for the colored janitor, Fisher, are interesting. Having 
been accustomed for several years to serve as subject in exercises and in¬ 
vestigations, he is perfectly at home in the work and yet has no interest 
or concern in the experiment beyond carrying out the instructions ; these 
facts make his record very reliable. His unusually long reaction-time 
has been observed for several years. 
The problem has thus found a definite solution : the intensity of the 
effort affects the reaction-time, making it shorter for the greater intensity. 
Simple and cortical reaction-time. 
(Howard F. Smith, M.D.) 
The determination of the time of a motor response to a direct stimu¬ 
lation of the cerebal cortex and a comparison of this time with the sim¬ 
ple reaction-time of the subject would apparently lead to certain con¬ 
clusions concerning the relation between mental and cerebral processes. 
The attempt has been made in the following manner. . 
A cat was held quietly in the hands of an assistant. A double pointed 
platinum electrode was rested against the skin at a suitable point. A
        

Nutzerhinweis

Sehr geehrte Benutzer,

aufgrund der aktuellen Entwicklungen in der Webtechnologie, die im Goobi viewer verwendet wird, unterstützt die Software den von Ihnen verwendeten Browser nicht mehr.

Bitte benutzen Sie einen der folgenden Browser, um diese Seite korrekt darstellen zu können.

Vielen Dank für Ihr Verständnis.