Wide Range Achievement Test Wide Range Achievement Psychometric Properties 5

Question 1

What is the mean and standard deviation of WRAT-5 standard scores, following the convention used for most standardized achievement tests?

Accepted Answer

Mean=100, SD=15

Answer

WRAT-5 standard scores use a mean of 100 and standard deviation of 15, consistent with the deviation IQ convention used by most cognitive and achievement tests.

Question 2

Which WRAT-5 psychometric characteristic is specifically relevant when deciding whether to administer all four subtests versus only selected subtests?

Accepted Answer

Composite score reliability compared to individual subtest reliability

Answer

Composite score reliability is higher than individual subtest reliability, so using all four subtests provides more reliable measurement than using any single subtest alone.

Question 3

Which statistical method was used in WRAT-5 development to detect items that function differently for boys versus girls, ensuring fairness?

Accepted Answer

Differential item functioning (DIF) analysis

Answer

Differential item functioning (DIF) analysis was used during WRAT-5 item development to identify and remove items that systematically advantage one gender group over another.

Question 4

A WRAT-5 examiner notices that an examinee's Spelling subtest score is significantly higher than their Word Reading score. What psychometric tool helps determine if this discrepancy is clinically meaningful?

Accepted Answer

A base rate table showing how frequently such discrepancies occur in the standardization sample

Answer

Base rate tables show how frequently a given score discrepancy occurred in the standardization sample, helping clinicians distinguish rare versus common patterns.

Question 5

Which WRAT-5 psychometric feature addresses whether the test accurately predicts future academic outcomes such as grade retention or graduation?

Accepted Answer

Predictive validity

Answer

Predictive validity evidence documents how well WRAT-5 scores forecast future academic outcomes, such as course grades, grade retention, or graduation rates.

Wide Range Achievement Test Practice Test

Wide Range Achievement Test Practice Test

Wide Range Achievement Test Wide Range Achievement Psychometric Properties 5