1388 
MANN Observes: “Vielleicht können wir drei Hauptformen des Arbeits- 
verlaufs unterscheiden, indem bei einigen Individuen die Arbeit mit 
einer relativ grossen Leistung einsetzt und dann mit mancherlei 
Schwankungen allmählich abnimmt, bei einer zweiten Gruppe von 
Menschen erreicht die Arbeit erst nach längerer Zeit ihr Maximum, 
um dann allmählig abzunehmen, bei einer dritten tritt das Arbeits- 
maximum erst gegen das Ende einer längeren Arbeit ein. *) Con- 
sidering that not any of the groups of boys and girls worked quickest 
in the first period, we could not verify the first type. The fairly- 
quick children, with the highest working-rate in the second period, 
are no doubt to be classified with tbe second type. Nor can it be 
doubted that Mbrumann’s third type is represented by the quick 
workers among the boys and the girls that work hardest in the 
third period and about equally hard in the first and second, as well 
as by the slow girls that work quicker and quicker and by the 
slow boys that, in spite of a fair start, begin to slacken a little in 
the second period, but still reach their maximum in the third. 
With regard to the types of workers we wish to say another word : 
With the exception of the eight-year-old boys and girls among the 
three categories and all the female subjects among the slow workers, 
all the other groups, whichever may be the age of the children, 
exhibit a striking constancy in the percentages of increase or decrease 
of rate resp. from the first to the second and from the second to 
the third. This appeared from a closer inspection of the data in 
table IL. The conclusion therefore seems justifiable that the types are 
formed after the 8" year and maintain themselves at the very least 
until the 12th year. New experiments with older children will have 
to show whether or no and if so when the type changes again. 
We cannot find ont to what cause the exception of the slow workers 
among the girls is to be ascribed. 
Lastly we have given in Table III a survey of the mistakes made 
in each category in the three periods established for Table I. A 
comparison of the values for every group enables us to form an 
idea of the changes in the accuracy of working among the three 
categories of workers as the work progresses. 
The quick workers among the boys and girls of different ages 
most often make most mistakes in the third period; only the boys 
from 9 to 12 and the girls of 12 years of age make most mistakes 
in the second period; for the boys of 9 and the girls of 12 the 
1) Vorlesungen zur Einführung in die experimentelle Pädagogik und ihre psycho- 
logischen Grundlagen. Il, Leipzig 1913, blz. 389; vgl. ook LII, blz. 51. 
