WAIS Psychometric Properties and Norms 3 — Questions and Answers
Question 1: The Flynn Effect refers to which observed trend in IQ test norms?
- Rising raw score performance over generations requiring periodic renorming (Correct answer)
- Decreasing variability in IQ scores over time
- Narrowing of the IQ bell curve since the 1970s
- Declining test-retest reliability in modern samples
Correct answer: Rising raw score performance over generations requiring periodic renorming
The Flynn Effect is the well-documented phenomenon of rising raw score performance across generations, necessitating updated norms.
Question 2: When interpreting WAIS-IV subtest scores, a scaled score of 10 represents performance at which level?
- Exactly at the population mean (Correct answer)
- One standard deviation above the mean
- One standard deviation below the mean
- At the 75th percentile
Correct answer: Exactly at the population mean
WAIS-IV subtest scaled scores have a mean of 10 and SD of 3, so a score of 10 is exactly average.
Question 3: Which WAIS-IV reliability method is most appropriate for evaluating the consistency of Processing Speed subtests?
- Test-retest reliability (Correct answer)
- Split-half reliability
- Interrater reliability
- Kuder-Richardson reliability
Correct answer: Test-retest reliability
Processing Speed subtests are speeded tasks where split-half methods are inappropriate; test-retest reliability is the standard approach.
Question 4: What is the standard error of measurement (SEM) primarily used for in WAIS-IV score interpretation?
- Constructing confidence intervals around obtained scores (Correct answer)
- Determining whether an examinee has a learning disability
- Selecting which subtests to administer
- Comparing two examinees' scores directly
Correct answer: Constructing confidence intervals around obtained scores
The SEM is used to build confidence intervals, expressing the range within which the true score likely falls.
Question 5: Discriminant validity evidence for the WAIS-IV is typically demonstrated by showing that WAIS-IV scores do NOT correlate highly with measures of which construct?
- Personality traits (Correct answer)
- Academic achievement
- Other cognitive ability tests
- Neuropsychological functioning
Correct answer: Personality traits
Discriminant validity is shown when WAIS-IV scores correlate weakly with theoretically unrelated constructs such as personality traits.
Question 6: A clinician compares a client's WAIS-IV FSIQ with their WMS-IV memory scores. This practice reflects which type of validity evidence?
- Convergent and discriminant validity (Correct answer)
- Content validity
- Face validity
- Predictive validity
Correct answer: Convergent and discriminant validity
Comparing WAIS-IV and WMS-IV scores examines both convergent validity (related cognitive domains) and discriminant validity (distinct constructs).
Question 7: The base rate of a given discrepancy between WAIS-IV index scores is important because it indicates which of the following?
- How frequently that discrepancy occurs in the normative population (Correct answer)
- Whether the discrepancy is clinically meaningful in all cases
- The probability the examinee has a specific neurological condition
- The statistical significance threshold for score differences
Correct answer: How frequently that discrepancy occurs in the normative population
Base rates show how common a discrepancy is in the general population, helping clinicians judge whether a difference is unusual.
WAIS Psychometric Properties and Norms 3
The Flynn Effect refers to which observed trend in IQ test norms?