1377 
Broadly speaking the work done by boys of 11 years is equal to 
the work done by girls of 12 years. Whereas with boys a slowing 
TABLE IV. 
Age (years) gein by the| Age | PEES | Progress of | Progress of 
8 1 
be Vas, Ue QI 23 25 
9 5 = 
9—10 13 15 14 
10 2 
et 10—11 25 5 15 
11 24 ——— 
Mat 26 24 25 
12 26 
of the regular progress is observed between 9 and 10 years, with 
girls it is not noticeable before the 10‘ year. Before and after that 
time the yearly progress is much more considerable both with boys 
and with girls. 
Table V divides the children in quick, fairly quick and slow. 
workers. The time required for the task varying from 6 to 18 
minutes, these three categories corresponded respectively with the 
three time-groups 6—9, 10—13, and 14—18 minutes‘). 
For every age, for boys and girls separately, and for the two 
sexes collectively, we give the percentages of the frequency, with 
which quick, fairly quick and slow workers occur. 
TABLE V. 
Boys Girls Children 
Age (years) | : en DE = 
Quick Head Slow Quick ee ' Slow || Quick dr Slow 
8 6 43 51 0 22 78 3 32.5 | 64.5 
9 14 57 29 0 34 66 7 45.5 | 47.5 
10 24 56 20 6 49 45 15 52.5 | 32.5 
11 45 50 | 5 20 43 37 32.5) 46.5 | 21 
12 Sy) a 40. 4 32 56 12 41 52.5 6.5 
1) Vel. F. Roers en Jom. WERKER: Proeven over opmerkzaamheid bij doove, 
slechthoorende en normale kinderen. |.c., p. 212 and 213. 
89 
