LABORATORY TESTS 



129 



final number gives a violent jerk of the head, upward. 

 The attention here would be characterized as being of type 

 III, described on page 94. (Owing to lack of space it is 

 impossible to give an example of type II, which is only 

 to be found in the case of very large numbers.) 



Figure 9 (von Allesch) is expressive of great, but — 

 according to the subject's introspection — not economical 

 concentration. Respiration, which before and after the 

 test was quite regular, during the test itself shows a 



Fig. 10. 



pause. (The tiny waves are due to the heart-beat.) The 

 subject had thought of 5, and this number is accompanied 

 by a decided head-jerk. But we note that even before 

 the final jerk a number of less pronounced jerks occur — 

 the result of poorly regulated psychic tension. 



Figure 10 (Schillings) depicts a very high degree of 

 uneconomical concentration. There was sudden concen- 

 tration at the beginning of the test, and a steady increase 

 throughout its course. Accordingly Mr. Schillings bent 



