Wide Range Achievement Test Wide Range Achievement Psychometric Properties 4 — Questions and Answers
Question 1: Discriminant validity for the WRAT-5 is best supported by which finding?
- WRAT-5 scores correlate highly with IQ scores
- WRAT-5 achievement scores are lower than IQ scores for the same individual
- WRAT-5 subtests correlate more strongly with each other than with unrelated constructs like processing speed (Correct answer)
- WRAT-5 scores predict future academic placement
Correct answer: WRAT-5 subtests correlate more strongly with each other than with unrelated constructs like processing speed
Discriminant validity is supported when WRAT-5 subtests show lower correlations with theoretically unrelated constructs (e.g., processing speed) than with each other.
Question 2: Which WRAT-5 psychometric property is primarily evaluated by examining whether the test measures the same construct equally well across different demographic groups?
- Criterion validity
- Measurement invariance / differential item functioning (Correct answer)
- Predictive validity
- Internal consistency
Correct answer: Measurement invariance / differential item functioning
Measurement invariance and differential item functioning (DIF) analyses evaluate whether WRAT-5 items function equivalently across demographic groups such as race, sex, or language background.
Question 3: When interpreting WRAT-5 scores for a bilingual student, which psychometric concern is most critical?
- The test lacks enough items at the ceiling level
- Norm sample representativeness for bilingual populations (Correct answer)
- The test-retest interval used in the standardization study
- The scoring algorithm for the composite score
Correct answer: Norm sample representativeness for bilingual populations
For bilingual students, the representativeness of the norm sample for that population is most critical, as norms based primarily on monolingual examinees may not generalize.
Question 4: Which WRAT-5 psychometric feature specifically addresses the practical concern of how much a score must change between administrations to reflect true ability change rather than measurement error?
- Percentile rank
- Reliable change index (RCI) (Correct answer)
- Standard error of estimate
- T-score conversion
Correct answer: Reliable change index (RCI)
The reliable change index (RCI) specifies the score change required to exceed measurement error and conclude that a real change in ability has occurred.
Question 5: The WRAT-5 Sentence Comprehension subtest's validity evidence includes correlations with which criterion variable that directly supports its intended construct?
- Nonverbal reasoning scores
- Reading comprehension measures from other standardized tests (Correct answer)
- Working memory index scores
- Visual-motor integration scores
Correct answer: Reading comprehension measures from other standardized tests
Sentence Comprehension validity is supported by substantial correlations with reading comprehension measures from other standardized tests, confirming the subtest measures its intended construct.
Question 6: Which age range does the WRAT-5 normative sample cover, defining its appropriate use population?
- 3 to 18 years
- 5 to 94 years (Correct answer)
- 6 to 75 years
- 8 to 65 years
Correct answer: 5 to 94 years
The WRAT-5 normative sample spans ages 5 to 94 years, making it one of the broadest achievement tests in terms of age range coverage.
Question 7: Which type of factor analytic evidence supports the four-subtest structure of the WRAT-5?
- Exploratory principal components analysis only
- Confirmatory factor analysis demonstrating adequate fit for a hierarchical model (Correct answer)
- Discriminant function analysis
- Cluster analysis of item response patterns
Correct answer: Confirmatory factor analysis demonstrating adequate fit for a hierarchical model
Confirmatory factor analysis (CFA) demonstrating acceptable fit for a hierarchical model supports the construct validity of the WRAT-5's four-subtest structure.
Wide Range Achievement Test Wide Range Achievement Psychometric Properties 4
Discriminant validity for the WRAT-5 is best supported by which finding?