Practice Test Geeks(WIAT) Wechsler Individual Achievement Test Practice Test
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Norm-Referenced Score Interpretation and Reporting Flashcards

7 cards from real WIAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What is the mean (average) standard score for the WIAT normative population?

    Answer: 100

    WIAT standard scores are norm-referenced with a mean of 100 and a standard deviation of 15, consistent with most individually administered achievement tests.

  2. What is the standard deviation of WIAT standard scores?

    Answer: 15

    WIAT standard scores have a standard deviation of 15, so a score of 115 is exactly one standard deviation above the mean of 100.

  3. A student earns a WIAT standard score of 115 on the Reading Composite. This score corresponds to approximately which percentile rank?

    Answer: 84th

    A standard score of 115 is exactly one standard deviation above the mean of 100, which corresponds to approximately the 84th percentile.

  4. Which qualitative descriptor best applies to a WIAT standard score of 85?

    Answer: Low Average

    On the WIAT, standard scores of 80–89 are described as Low Average, placing the score below average but not in the Borderline range.

  5. What does a percentile rank of 50 on the WIAT indicate?

    Answer: The student performed better than 50% of same-age peers

    A percentile rank of 50 means the student scored at or above 50% of the normative reference group of the same age, not that they got 50% of items correct.

  6. Which type of WIAT score describes performance in terms of the typical age at which that level of achievement is normally observed?

    Answer: Age equivalent

    Age equivalents express a student's performance as the age in the normative sample at which the average student earned that same raw score.

  7. A 95% confidence interval of 90–102 reported for a WIAT standard score means:

    Answer: There is a 95% probability that the student's true score falls within this range

    Confidence intervals reflect measurement error; a 95% confidence interval means there is a 95% probability that the interval contains the student's true score.