Wechsler Psychometric Properties Flashcards
7 cards from real Wechsler Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Wechsler Psychometric Properties flashcards as text
An IQ score of 70 on a Wechsler scale corresponds to approximately what percentile rank?
Answer: 2nd percentile
An IQ of 70 is two SDs below the mean, corresponding to roughly the 2nd percentile.
Which validity type is established by having experts judge whether subtest items adequately sample the domain being measured?
Answer: Content validity
Content validity is judged by experts evaluating whether items represent the intended domain.
Convergent validity for a Wechsler index would be demonstrated by a strong correlation with:
Answer: Another established intelligence test
Convergent validity is shown when a measure correlates highly with other measures of the same construct.
The 90% confidence interval reported with a Wechsler Full Scale IQ is wider than the 68% interval because:
Answer: Greater confidence requires a broader score range
Higher confidence levels require wider intervals to capture the true score with greater certainty.
If a subtest has a reliability coefficient of 0.90, this generally indicates:
Answer: Adequate to high reliability
A reliability coefficient of 0.90 reflects high reliability, well above commonly accepted minimums.
Why does the Full Scale IQ typically have higher reliability than any single Wechsler subtest?
Answer: It aggregates multiple subtests, averaging out error
Combining many subtests increases reliability by averaging out individual subtest measurement error.
A floor effect on a Wechsler subtest limits its usefulness primarily for which population?
Answer: Examinees with very low ability
A floor effect means the subtest cannot differentiate among very low-functioning examinees because it lacks easy enough items.