Wechsler Test Wechsler Psychometric Properties 5

Question 1

An IQ score of 70 on a Wechsler scale corresponds to approximately what percentile rank?

Accepted Answer

2nd percentile

Answer

An IQ of 70 is two SDs below the mean, corresponding to roughly the 2nd percentile.

Question 2

Which validity type is established by having experts judge whether subtest items adequately sample the domain being measured?

Accepted Answer

Content validity

Answer

Content validity is judged by experts evaluating whether items represent the intended domain.

Question 3

Convergent validity for a Wechsler index would be demonstrated by a strong correlation with:

Accepted Answer

Another established intelligence test

Answer

Convergent validity is shown when a measure correlates highly with other measures of the same construct.

Question 4

The 90% confidence interval reported with a Wechsler Full Scale IQ is wider than the 68% interval because:

Accepted Answer

Greater confidence requires a broader score range

Answer

Higher confidence levels require wider intervals to capture the true score with greater certainty.

Question 5

If a subtest has a reliability coefficient of 0.90, this generally indicates:

Accepted Answer

Adequate to high reliability

Answer

A reliability coefficient of 0.90 reflects high reliability, well above commonly accepted minimums.

Wechsler Test Practice Test