NNAT3 Score Interpretation 2 — Questions and Answers
Question 1: A student's NNAT3 Naglieri Ability Index (NAI) is 115. Which percentile range does this most likely correspond to?
- Below the 50th percentile
- Approximately the 84th percentile (Correct answer)
- Approximately the 99th percentile
- Exactly the 50th percentile
Correct answer: Approximately the 84th percentile
An NAI of 115 is one standard deviation above the mean (100), corresponding to roughly the 84th percentile.
Question 2: Which NNAT3 score is most appropriate to use when comparing a student to peers nationally?
- Raw score
- Naglieri Ability Index (NAI) (Correct answer)
- Scaled score
- Number of correct responses
Correct answer: Naglieri Ability Index (NAI)
The NAI is a normalized standard score (mean=100, SD=15) that allows direct national comparison across age groups.
Question 3: A score report shows a student's NNAT3 percentile rank as 63. How should a teacher interpret this?
- The student answered 63% of items correctly
- The student scored higher than 63% of the national norm group (Correct answer)
- The student is in the 63rd grade-equivalent level
- The student needs 63 more points to reach average
Correct answer: The student scored higher than 63% of the national norm group
A percentile rank of 63 means the student outperformed 63% of students in the standardization sample.
Question 4: On the NNAT3, the stanine scale divides the normal distribution into how many bands?
- 5
- 7
- 9 (Correct answer)
- 10
Correct answer: 9
Stanines divide scores into 9 bands, with stanine 5 representing average performance.
Question 5: A student receives an NNAT3 NAI of 85. Which classification best describes this performance?
- Very superior
- High average
- Low average (Correct answer)
- Exceptionally high
Correct answer: Low average
An NAI of 85 falls one standard deviation below the mean, typically classified as low average.
Question 6: What does the confidence interval reported alongside an NNAT3 NAI score indicate?
- The range of scores the student is guaranteed to earn on a retest
- The range within which the student's true score likely falls (Correct answer)
- The percentage of correct answers on the test
- The student's ranking within their classroom
Correct answer: The range within which the student's true score likely falls
A confidence interval reflects measurement error, indicating the range where the student's true ability score most likely lies.
Question 7: When interpreting NNAT3 scores for gifted program eligibility, which score type is most commonly used by districts?
- Raw score
- Age-based NAI and percentile rank (Correct answer)
- Stanine alone
- Grade-equivalent score
Correct answer: Age-based NAI and percentile rank
Districts typically use the age-based NAI and percentile rank because they provide a nationally normed, age-fair measure of ability.
NNAT3 Score Interpretation 2
A student's NNAT3 Naglieri Ability Index (NAI) is 115.
Which percentile range does this most likely correspond to?