Wide Range Achievement Test Wide Range Achievement Psychometric Properties 2 — Questions and Answers
Question 1: Which type of reliability is most commonly reported for the WRAT-5 subtests and reflects consistency across different items measuring the same construct?
- Test-retest reliability
- Internal consistency reliability (Correct answer)
- Inter-rater reliability
- Parallel-forms reliability
Correct answer: Internal consistency reliability
Internal consistency reliability (e.g., coefficient alpha) is most commonly reported for WRAT-5 subtests, reflecting how consistently items measure the same construct.
Question 2: When the WRAT-5 was normed, which statistical method was used to smooth the score distributions across age groups?
- Linear interpolation only
- Continuous norming with regression-based smoothing (Correct answer)
- Simple rank-ordering
- Z-score transformation without smoothing
Correct answer: Continuous norming with regression-based smoothing
Continuous norming with regression-based smoothing was used during WRAT-5 standardization to produce stable norm tables across the age span.
Question 3: A WRAT-5 Word Reading standard score of 85 falls in which descriptive classification range?
- Average
- Low Average (Correct answer)
- Below Average
- Borderline
Correct answer: Low Average
A standard score of 85 falls one standard deviation below the mean (100) and is typically classified as Low Average (80–89 range).
Question 4: Which WRAT-5 subtest shows the highest floor effects when used with individuals who have severe intellectual disabilities?
- Math Computation (Correct answer)
- Sentence Comprehension
- Word Reading
- Spelling
Correct answer: Math Computation
Math Computation tends to show higher floor effects with severely cognitively impaired individuals because even the easiest items require basic numeral recognition and operation understanding.
Question 5: The WRAT-5 standardization sample stratification was primarily based on which demographic variables?
- Age, sex, race/ethnicity, and educational level (Correct answer)
- Age, IQ score, socioeconomic status, and region
- Race/ethnicity, household income, and school type
- Sex, grade level, and parental occupation only
Correct answer: Age, sex, race/ethnicity, and educational level
The WRAT-5 normative sample was stratified by age, sex, race/ethnicity, and educational level to match U.S. Census proportions.
Question 6: Which validity evidence type is demonstrated when WRAT-5 scores correlate highly with other established academic achievement tests?
- Content validity
- Concurrent validity (Correct answer)
- Predictive validity
- Discriminant validity
Correct answer: Concurrent validity
Concurrent validity is evidenced when WRAT-5 scores correlate substantially with scores from other established achievement measures administered at the same time.
Question 7: For the WRAT-5, what is the primary purpose of the confidence interval reported around a standard score?
- To show the range of possible true scores given measurement error (Correct answer)
- To indicate the percentile band for that score
- To compare performance across different subtests
- To estimate the probability of a specific diagnosis
Correct answer: To show the range of possible true scores given measurement error
Confidence intervals around standard scores convey the range within which the examinee's true score likely falls, accounting for the standard error of measurement.
Wide Range Achievement Test Wide Range Achievement Psychometric Properties 2
Which type of reliability is most commonly reported for the WRAT-5 subtests and reflects consistency across different items measuring the same construct?