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

1st percentile

Answer

16th percentile

Answer

25th 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

Criterion validity

Answer

Face validity

Answer

Convergent validity

Question 3

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

Accepted Answer

Another established intelligence test

Answer

A measure of an unrelated trait

Answer

A random number generator

Answer

The examinee's shoe size

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

The test is less reliable

Answer

The mean changes

Answer

The SD is larger

Question 5

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

Accepted Answer

Adequate to high reliability

Answer

Poor reliability

Answer

Perfect validity

Answer

No measurement error

Question 6

Why does the Full Scale IQ typically have higher reliability than any single Wechsler subtest?

Accepted Answer

It aggregates multiple subtests, averaging out error

Answer

It uses fewer items

Answer

It ignores norms

Answer

It is scored by one rater

Question 7

A floor effect on a Wechsler subtest limits its usefulness primarily for which population?

Accepted Answer

Examinees with very low ability

Answer

High-ability examinees

Answer

Average examinees

Answer

Examinees of average age