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
On the WAIS-IV and WISC-V, the Full Scale IQ has a mean of 100 and a standard deviation of what value?
Answer: 15
Wechsler scales use a Full Scale IQ mean of 100 and a standard deviation of 15.
Individual Wechsler subtest scaled scores are reported on a scale with a mean of 10 and a standard deviation of how much?
Answer: 3
Subtest scaled scores have a mean of 10 and a standard deviation of 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?
Answer: Test-retest reliability
Test-retest reliability measures the stability of scores across repeated administrations over time.
A correlation between WAIS-IV scores and an independent measure of academic achievement provides evidence of what kind of validity?
Answer: Criterion-related validity
Correlating test scores with an external outcome like achievement reflects criterion-related (concurrent or predictive) validity.
What does the Standard Error of Measurement (SEM) primarily help clinicians construct around an obtained Wechsler IQ score?
Answer: A confidence interval
The SEM is used to build a confidence interval indicating the range likely to contain the true score.
An IQ of 130 on a Wechsler scale (mean 100, SD 15) falls how many standard deviations above the mean?
Answer: 2 SD
130 minus 100 equals 30, which is two standard deviations of 15 above the mean.
What is the approximate percentage of the population that scores within the average range (IQ 85-115) on Wechsler scales?
Answer: About 68%
Scores within one SD of the mean (85-115) capture roughly 68% of the population in a normal distribution.