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Steps in Creating Short Forms of IQ Tests 

(Quick, Dirty, and Not Recommended)

 

Three subtest short form:

…intercorrelations
Multiplier
Additive
.59-.64
2.4
27
.65-.70
2.4
28
.71-.76
2.4
29
.77-.82
2.3
30
.83-.89
2.3
31
.90-.96
2.3
32
.97-1.04
2.2
33
1.05-1.12
2.2
34
1.13-1.20
2.2
35
1.21-1.29
2.1
36
1.30-1.37
2.1
37
1.38-1.47
2.1
38
1.48-1.57
2.0
39
1.58-1.67
2.0
40
1.68-1.78
2.0
41
1.79-1.90
1.9
42
1.91-2.02
1.9
43
2.03-2.15
1.9
44
2.16-2.28
1.8
45
2.29-2.43
1.8
46
2.44-2.58
1.8
47
2.59-2.74
1.7
48

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