20,3 Hartendorp: Some Results with Intelligence Tests 9297 
racial types, but to show that each type contains individuals 
of high mental ability. The table is given for what it is worth. 
Direct comparison between the scores obtained in the Otis 
scale by Americans and Filipinos would hardly be fair, owing 
to the different conditions; but, for the sake of completeness, 
the following American norms are given: 
Year. Score. 
8 40 
9 52 
10 64 
11 76 
12 88 
13 100 
14 112 
15 121 
16 125 
17 128 
18 130 
In a letter to me Doctor Otis says: 
The normal intelligence for adults is considered to be constant for all 
ages above 18 years and is represented by a score of 130 points. Teachers 
are considered to be a group above “average” in intelligence and will range 
from 100 to 200 points in their scores. 
a 
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Test. 
Fic. 3. Average scores in each test separately. 
