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Steps in Creating Short Forms of IQ Tests 

(Quick, Dirty, and Not Recommended)

 

Two subtest short form:

Sum of intercorrelations
Multiplier
Additive
.19-.20
3.2
35
.21-.25
3.2
36
.26-.27
3.1
37
.28-.32
3.1
38
.33-.34
3.1
39
.35-.36
3.0
39
.37-.41
3.0
40
.42-.43
3.0
41
.44-.46
2.9
41
.47-.51
2.9
42
.52-.53
2.9
43
.54-.56
2.8
43
.57-.62
2.8
44
.63-.65
2.8
45
.66-.68
2.7
45
.69-.74
2.7
46
.75-.77
2.7
47
.78-.81
2.6
47
.82-.88
2.6
48
.89-.92
2.6
49
.93-.96
2.5
49
.97-99
2.5
50