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Estimates of the Percentage of Population Obtaining Given Discrepancies Between Various WJ III® Tests

 

 

Age

 

 

Percentage Obtaining given or greater discrepancy in either direction

 2-3

 4-5

 6-8

 9-13

14-19

20-39

Percentage Obtaining given or greater discrepancy in a specific direction

 

50

11.05

8.53

8.02

7.02

6.04

5.28

25

 

25

18.42

14.22

13.36

11.70

10.06

8.80

12.5

Comprehension-Knowledge (Gc)

20

20.50

15.83

14.87

13.02

11.20

9.79

10

Verbal Comprehension (LK, LD)

10

26.43

20.41

19.17

16.79

14.43

12.62

5

General Information (K0)

5

31.39

24.24

22.77

19.94

17.14

14.99

2.5

 

2

37.32

28.82

27.07

23.70

20.38

17.82

1

 

1

41.32

31.91

29.98

26.25

22.57

19.73

.5

 

.1

52.85

40.82

38.34

33.57

28.86

25.24

.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Age

 

 

Percentage Obtaining given or greater discrepancy in either direction

 2-3

 4-5

 6-8

 9-13

14-19

20-39

Percentage Obtaining given or greater discrepancy in a specific direction

 

50

 

11.53

11.34

11.43

10.14

10.25

25

 

25

 

19.21

18.90

19.05

16.90

17.08

12.5

Short-term Memory (Gsm)

20

 

21.38

21.03

21.21

18.81

19.01

10

Numbers Reversed (MW)

10

 

27.56

27.11

27.34

24.25

24.50

5

Memory for Words (MS)

5

 

32.74

32.21

32.47

28.81

29.10

2.5

 

2

 

38.92

38.29

38.60

34.24

34.60

1

 

1

 

43.09

42.39

42.75

37.92

38.31

.5

 

.1

 

55.12

54.22

54.67

48.50

49.00

.05

                 
                 
                 
                 

 

 

Age

 

 

Percentage Obtaining given or greater discrepancy in either direction

 2-3

 4-5

 6-8

 9-13

14-19

20-39

Percentage Obtaining given or greater discrepancy in a specific direction

 

50

10.55

11.80

13.42

13.09

12.42

11.89

25

 

25

17.59

19.67

22.36

21.82

20.70

19.82

12.5

Visual Processing (Gv)

20

19.58

21.89

24.89

24.29

23.04

22.06

10

Spatial Relations (VZ, SR)

10

25.24

28.22

32.08

31.31

29.70

28.44

5

Picture Recognition (MV)

5

29.98

33.52

38.11

37.19

35.28

33.78

2.5

 

2

35.64

39.85

45.30

44.21

41.94

40.15

1

 

1

39.47

44.12

50.16

48.95

46.44

44.46

.5

 

.1

50.48

56.44

64.16

62.61

59.40

56.87

.05

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Age

 

 

Percentage Obtaining given or greater discrepancy in either direction

 2-3

 4-5

 6-8

 9-13

14-19

20-39

Percentage Obtaining given or greater discrepancy in a specific direction

 

50

 

 

12.42

12.84

12.07

11.98

25

 

25

 

 

20.70

21.41

20.12

19.97

12.5

Auditory Processing (Ga)

20

 

 

23.04

23.83

22.39

22.23

10

Sound Blending (PC-S)

10

 

 

29.70

30.71

28.86

28.65

5

Auditory Attention (UR, US)

5

 

 

35.28

36.48

34.29

34.03

2.5

 

2

 

 

41.94

43.37

40.76

40.46

1

 

1

 

 

46.44