WIAT Norm-Referenced Score Interpretation and Reporting

Question 1

What is the mean (average) standard score for the WIAT normative population?

Accepted Answer

100

Answer

50

Answer

85

Answer

115

Question 2

What is the standard deviation of WIAT standard scores?

Accepted Answer

15

Answer

5

Answer

10

Answer

20

Question 3

A student earns a WIAT standard score of 115 on the Reading Composite. This score corresponds to approximately which percentile rank?

Accepted Answer

84th

Answer

50th

Answer

68th

Answer

97th

Question 4

Which qualitative descriptor best applies to a WIAT standard score of 85?

Accepted Answer

Low Average

Answer

Average

Answer

Borderline

Answer

High Average

Question 5

What does a percentile rank of 50 on the WIAT indicate?

Accepted Answer

The student performed better than 50% of same-age peers

Answer

The student answered 50% of items correctly

Answer

The student is proficient in all academic areas

Answer

The student scored exactly at the standard score mean

Question 6

Which type of WIAT score describes performance in terms of the typical age at which that level of achievement is normally observed?

Accepted Answer

Age equivalent

Answer

Standard score

Answer

Percentile rank

Answer

Stanine

Question 7

A 95% confidence interval of 90–102 reported for a WIAT standard score means:

Accepted Answer

There is a 95% probability that the student's true score falls within this range

Answer

The true score is guaranteed to fall between 90 and 102

Answer

The student scored between 90 and 102 on 95% of subtests

Answer

95% of students in the norm group scored in this range