Differences required for Significance When Each WPPSI III® Subtest Scaled Score is Compared to the Mean Subtest Scaled Score for an Individual Child

Age 4:0 to 7:3

Subtest

Mean of 3 subtests

Mean of 4 subtests

Mean of 4 subtests

Mean of 5 subtests

Mean of 7 subtests

Mean of 7 subtests

Mean of 10 subtests

Mean of 12 subtests

Mean of 14 subtests

.05

.01

.05

.01

.05

.01

.05

.01

.05

.01

.05

.01

.05

.01

.05

.01

.05

.01

Information

2.12

2.43

2.38

2.88

2.34

2.82

2.36

2.82

2.81

3.35

2.81

3.35

3.00

3.53

3.10

3.63

3.18

3.66

Vocabulary

1.98

2.38

2.19

2.65

2.14

2.59

2.29

2.74

2.53

3.02

2.53

3.02

2.69

3.16

2.78

3.25

2.84

3.27

Word Reasoning

1.86

2.41

2.01

2.43

1.95

2.36

2.07

2.47

2.27

2.71

2.27

2.71

2.39

2.80

2.46

2.88

2.51

2.89

(Comprehension)

2.22

2.68

2.33

2.78

2.74

3.22

2.83

3.31

2.89

3.33

(Similarities)

1.70

2.05

1.76

2.10

1.95

2.29

2.00

2.34

2.03

2.34

Block Design

2.20

2.68

2.49

3.01

2.53

3.06

2.69

3.21

2.95

3.52

2.95

3.52

3.17

3.72

3.28

3.84

3.36

3.87

Matrix Reasoning

1.95

2.38

2.12

2.56

2.17

2.62

2.27

2.71

2.43

2.90

2.43

2.90

2.58

3.02

2.56

3.11

2.71

3.12

Picture Concepts

1.91

2.33

2.05

2.48

2.10

2.54

2.18

2.61

2.33

2.78

2.33

2.78

2.46

2.89

2.53

2.96

2.59

2.98

(Picture Completion)

2.12

2.56

2.27

2.71

2.58

3.02

2.65

3.11

2.71

3.12

(Object Assembly)

2.55

3.08

2.65

3.16

3.20

3.75

3.30

2.87

3.39

3.9

Coding

2.97

3.55

3.30

2.87

3.39

3.90

(Symbol Search)

3.00

3.57

3.33

3.90

3.41

3.93

(Receptive Vocabulary)

3.05

3.51

(Picture Naming)

3.00

3.45