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Naglieri General Ability Tests™

Jack A. Naglieri, Ph.D.; Dina Brulles, Ph.D.; Kimberly Lansdowne, Ph.D.
Product Details

The Naglieri General Ability Tests™–Verbal (Naglieri–V: Naglieri & Brulles, 2021), Naglieri General Ability Tests™–Nonverbal (Naglieri–NV, Naglieri, 2021), and Naglieri General Ability Tests™–Quantitative (Naglieri–Q: Naglieri & Lansdowne, 2021) were thoughtfully designed to measure general ability in a way that minimizes the influence of culture, language, economic background, and academic knowledge to maximize accuracy. The tests measure how well students think, rather than what students know. Each test takes approximately 30 to 35 minutes to complete. The Naglieri General Ability Tests are three separate measures (Naglieri–Verbal, Naglieri–Nonverbal, and Naglieri–Quantitative) that can be used individually or in any combination. For users requiring multiple measures as part of their identification process, each individual test can be used alone or if multiple tests are administered a combined score can be generated.

The Naglieri General Ability Tests were explicitly designed to promote fair gifted identification by:
  • Measuring general ability with minimal demands for previous knowledge.
  • Using animated instructions that eliminate the need for lengthy verbal instructions.
  • Using items that contain pictures, shapes, and diagrams instead of words, such that they can be solved regardless of the language the student speaks.
  • Providing the option to score tests using local and national norms.
Discover a better approach to gifted identification with the Naglieri General Ability Tests.

National Norms

  • Age-Based: 5 years 2 months to 14 years 9 months
  • Grade-Based: Kindergarten to Grade 6

Local Norms

  • Age-Based: 5 years 2 months to 14 years 9 months
  • Grade-Based: Kindergarten to Grade 9

Rater Type

  • The Naglieri General Ability Tests consist of three performance tests that assess general ability across verbal, nonverbal, and quantitative content areas.

Administration Time

  • Naglieri General Ability Tests–Verbal (Naglieri–V): 30 minutes
  • Naglieri General Ability Tests–Nonverbal (Naglieri–NV): 30 minutes
  • Naglieri General Ability Tests–Quantitative (Naglieri–Q): 30 minutes

Number of Items

  • 40 items

Translations

  • The directions for administration script is available in English and in Spanish (North America). Please note however that the test itself (i.e., the animated test instructions that students view and the items themselves) does not contain any text and therefore does not require translation.

Qualification Level

  • B

Format(s)

  • Administered and scored online

Reading Level

  • The items themselves use pictures, shapes, and diagrams and thus minimal reading is required to complete the tests. The only text that is present within the test that students must read are numbers.
Reports

We understand that each school district has a unique set of needs. That's why we offer a variety of ways to report and utilize your assessment results. Whether you need summarized data for all students, individual reports, or integration with your school's existing analytics and reporting systems, we have the right solution for you. Work with our team to get the information you need in the format that works best for you.

Reliability, Validity and Fairness – Age-Based Norms

Reliability

Internal consistency (as measured by marginal reliability, rxx) of the Naglieri General Ability Tests exceed recommended guidelines (median rxx for Naglieri–V = .92; Naglieri–NV = .90; Naglieri–Q = .91).

Validity

Confirmatory factor analyses confirmed the measurement model of the Naglieri General Ability Tests, showing strong support for a bifactor model of general ability with supporting, specific factors for the three test modalities. Additionally, students identified as gifted scored significantly higher than students from the general population (Cohen's d = 0.93; p < .001 for Total Grade-Based National Standard Scores), demonstrating strong evidence for the tests' ability to differentiate meaningful groups.

Fairness

The tests show no evidence of measurement bias; a student’s score is a true reflection of their ability and not representative of their gender, race, or ethnicity (i.e., male, female, White, Black, and Hispanic students). Differential test functioning analyses demonstrated that the tests operate identically across groups and do not inherently advantage or disadvantage any group. Overall, mean differences between racial/ethnic groups were small to moderate (based on Grade-Based National Norms), providing support for the generalizability of the Naglieri General Ability Tests.

Normative Data

The National Age-Based Normative Sample includes 19,000 students between the ages of 5 years 2 months and 14 years 9 months. The National Age-Based Normative Sample was built on test administrations of students between 2022 and 2025. To create the National Age-Based Normative Sample, data were balanced evenly by gender and stratified by race/ethnicity and geographic region to match recent U.S. census figures within 2.5 percentage points.

Local Norms involve comparing students to others at the same grade level (Kindergarten to Grade 9) in their school building or school district. Local norms are most effective when used with districts/schools that do not reflect the national demographic.

Resources

To learn more about how to increase fairness using the Naglieri General Ability Tests, please see our brochure.

Ordering
Contact Us
  • Call Toll-Free
    CDN1.800.268.6011
    US1.800.456.3003
  • International Phone
    +1.416.492.2627

For more information about the Naglieri General Ability Tests, or to purchase, please contact MHS Customer Service:

E-mail: [email protected]