NNAT3 Scoring and Interpretation of Results 2

Question 1

What does a Naglieri Ability Index (NAI) of 100 signify?

Accepted Answer

Performance exactly at the national average for the age group

Answer

An NAI of 100 represents exactly average performance, placing the student at the 50th percentile nationally.

Question 2

Which statistic describes the percentage of students in the normative sample who scored at or below a given raw score?

Accepted Answer

Percentile rank

Answer

A percentile rank indicates what percentage of same-age peers in the norm group scored at or below that student's score.

Question 3

On the NNAT3, what is the standard deviation of the Naglieri Ability Index?

Accepted Answer

15

Answer

The NAI is scaled with a mean of 100 and a standard deviation of 15, consistent with most ability tests.

Question 4

A student's NNAT3 score report shows a stanine of 9. What does this mean?

Accepted Answer

The student scored in the highest performance band

Answer

Stanine 9 is the highest of the nine stanine bands, representing the top approximately 4% of performers.

Question 5

How are raw scores converted to Naglieri Ability Index scores on the NNAT3?

Accepted Answer

Through age-based norm tables that convert raw scores to standard scores

Answer

Raw scores are compared to the performance of a nationally representative age-matched normative sample using conversion tables.

(NNAT3) Naglieri Nonverbal Ability Test 3 Practice Test