Wechsler Test Wechsler Psychometric Properties 2

Question 1

On the WAIS-IV and WISC-V, the Full Scale IQ has a mean of 100 and a standard deviation of what value?

Accepted Answer

15

Answer

Wechsler scales use a Full Scale IQ mean of 100 and a standard deviation of 15.

Question 2

Individual Wechsler subtest scaled scores are reported on a scale with a mean of 10 and a standard deviation of how much?

Accepted Answer

3

Answer

Subtest scaled scores have a mean of 10 and a standard deviation of 3.

Question 3

Which type of reliability is most relevant when asking whether a Wechsler subtest yields stable results when the same person is retested weeks later?

Accepted Answer

Test-retest reliability

Answer

Test-retest reliability measures the stability of scores across repeated administrations over time.

Question 4

A correlation between WAIS-IV scores and an independent measure of academic achievement provides evidence of what kind of validity?

Accepted Answer

Criterion-related validity

Answer

Correlating test scores with an external outcome like achievement reflects criterion-related (concurrent or predictive) validity.

Question 5

What does the Standard Error of Measurement (SEM) primarily help clinicians construct around an obtained Wechsler IQ score?

Accepted Answer

A confidence interval

Answer

The SEM is used to build a confidence interval indicating the range likely to contain the true score.

Wechsler Test Practice Test