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Steps in Creating Short Forms of IQ Tests 

(Quick, Dirty, and Not Recommended)

 

Four subtest short form:

…intercorrelations
Multiplier
Additive
.98-1.01
2.0
18
1.02-1.08
2.0
19
1.09-1.16
2.0
20
1.17-1.24
2.0
21
1.25-1.28
2.0
22
1.29-1.32
1.9
22
1.33-1.41
1.9
23
1.42-1.50
1.9
24
1.51-1.60
1.9
25
1.61-1.65
1.9
26
1.66-1.70
1.8
26
1.71-1.80
1.8
27
1.81-1.91
1.8
28
1.92-2.02
1.8
29
2.03-2.08
1.8
30
2.09-2.14
1.7
30
2.15-2.26
1.7
31
2.27-2.38
1.7
32
2.39-2.52
1.7
33
2.53-2.59
1.7
34
2.60-2.66
1.6
34
2.67-2.80
1.6
35
2.81-2.96
1.6
36
2.97-3.12
1.6
37
3.13-3.20
1.6
38
3.21-3.28
1.5
38
3.29-3.46
1.5
39
3.47-3.64
1.5
40
3.65-3.84
1.5
41
3.85-3.94
1.5
42
3.95-4.04
1.4
42
4.05-4.26
1.4
43
4.27-4.49
1.4
44
4.50-4.73
1.4
45
4.74-4.85
1.4
46

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