(Leiter-3) Leiter International Performance Scale, Third Edition

by Gale H. Roid, PhD, Lucy J. Miller, PhD, et al
Expedited Shipping
Based on a sample of 1,600+ typical individuals reflecting the general population in terms of ethnicity/race, gender, and age
Individually administered, game-like tasks assessing cognitive, attentional, and neuropsychological abilities
20-45 minutes
3 to 75+ years
Offers a completely nonverbal measure of intelligence that is ideal for use with those who are cognitively delayed, non-English speaking, hearing impaired, speech impaired, or on the autism spectrum
Publish Date
Level C required.

About Qualification Levels

Have a question? CALL 800.648.8857

(Leiter-3) Leiter International Performance Scale, Third Edition

From $37.50

To $2,023.50

In stock


to download sample materials.

Don't have an account?

Customize (Leiter-3) Leiter International Performance Scale, Third Edition
Kits & Manuals
Leiter-3 Kit
SKU: S-35

Includes Leiter-3 Manual; 20 Record Forms; 20 Response Booklets; all Manipulatives (Frame, Blocks, Foam Pieces, Stimulus Cards, and Attention Divided Bowls); Easel Book; Stimulus Book; Scoring Keys; Administration Gestures Laminate; a timer; and a purple marker; all in a rolling case.

1 x Leiter-3 Kit   + $1,295.00
Leiter-3 Record Form (Pack of 20)
SKU: S-35B
1 x Leiter-3 Record Form (Pack of 20)   + $86.00
Leiter-3 Growth Profile Form (Pack of 20)
SKU: S-35C
1 x Leiter-3 Growth Profile Form (Pack of 20)   + $41.00
Leiter-3 Response Booklet (Pack of 20)
SKU: S-35A
1 x Leiter-3 Response Booklet (Pack of 20)   + $97.00
Stimulus Materials
Leiter-3 Stimulus Book
SKU: S-35E
1 x Leiter-3 Stimulus Book   + $97.00
Leiter-3 Scoring Software
SKU: S-35U

Includes USB Key. Unlimited uses. Requires Windows 10, 8, 7, Vista, XP, or Macintosh OSX (Intel based 10.10 and or later)

1 x Leiter-3 Scoring Software   + $260.00
Kits & Manuals
Leiter-3 Manual
SKU: S-35M
1 x Leiter-3 Manual   + $110.00

* Required Fields

Your Customization
(Leiter-3) Leiter International Performance Scale, Third Edition
(Leiter-3) Leiter International Performance Scale, Third Edition

In stock



    About This Product


    The Leiter-3, which replaces the widely used Leiter-R, is a test of nonverbal intelligence and cognitive abilities, updated and redesigned to cover an expanded age range (3 to 75+) and to address specific disabilities. Neither the examiner nor the examinee is required to speak, and the latter doesn’t need to read or write either. The test’s engaging, game-like tasks hold the examinee’s interest, and its easy administration and quick, objective scoring make for an efficient assessment. 

    Since the Leiter-3 is completely nonverbal, it is especially suitable for individuals with cognitive delays, speech or hearing problems, motor impairments, ADHD, or traumatic brain injury, as well as those who don’t speak English. Because the test features a refined block-and-frame format, it also allows more accurate assessment of individuals on the autism spectrum. Lightweight blocks with rounded corners, along with foam manipulatives, ensure safe administration to examinees with cognitive or physical disabilities.

    Fewer Subtests for More Efficient Assessment

    The Leiter-3 includes the best of the Leiter-R subtests, as well as several new measures. The number of subtests has been reduced from 20 to 10 by eliminating selected items at overrepresented difficulty levels and combining some of the Leiter-R scales.

    • Cognitive Scales (Fluid Intelligence)

    Sequential Order

    Form Completion

    Classification and Analogies


    Matching/Repeated Patterns (optional subtest) 

    • Attention and Memory Scales

    Forward Memory

    Reverse Memory

    Attention Sustained

    Attention Divided

    Nonverbal Stroop

    The Attention and Memory Scales distinguish children with ADHD or other neuropsychological impairments from typical children. They also enhance interpretation of the global IQ score by providing valuable diagnostic indicators that help explain scores on the Cognitive Scales. 

    In addition to the subtests listed above, the Leiter-3 includes Social–Emotional Examiner Rating Scales that allow the examiner to record information about the examinee’s attention, activity level, mood regulation, organization skills, anxiety, sociability, impulse control, energy and feelings, and sensory reactivity.

    Scores That Reflect Innate Ability, With No Cultural or Language Bias

    Unlike other IQ tests, the Leiter-3 emphasizes fluid intelligence, considered by many the truest measure of a person’s innate ability. As a reliable assessment measure, the Leiter-3 IQ score is not significantly influenced by the examinee’s language skills, or by educational, social, or family experience.

    In addition to a global IQ score, the Leiter-3 provides subtest and composite scores. Expressed as scaled scores, percentiles, and age equivalents, these identify specific strengths and weaknesses, making test results easier for parents and other professionals to understand.

    The test also offers unique Growth Scores that can reveal small but important improvements in people with significant cognitive disabilities. These scores allow psychologists, educators, and parents to see gains over time, regardless of age-based standard scores.

    The Leiter-3 was standardized on more than 1,600 typical individuals from diverse regions and educational backgrounds, representing the most current general population in terms of ethnicity, gender, and age.

    Rather than focusing on deficits, the Leiter-3 provides meaningful information about cognitive abilities. Charts showing progressive skills enhance score interpretation, giving examiners a graphic representation of the individual’s capabilities.

    Terms Often used to search for (Leiter-3) Leiter International Performance Scale, Third Edition

    Leiter, Leiter 3, Leiter International Performance Scale, manual, training, template, reliability.