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Cognitive Assessment System, Second Edition

Jack A. Naglieri, PhD, J. P. Das, PhD, and Sam Goldstein, PhD

Measures cognitive processing ability
Paper and pencil, Online
Age range:
4 years to 18 years
40–60 minutes; 5–10 minutes to score
Qualification level:
All qualifications for Level B plus an advanced professional degree that provides appropriate training in the administration and interpretation of psychological tests, or license or certification from an agency that requires appropriate training and experience in the ethical and competent use of psychological tests. Close

The CAS2 is designed to measure cognitive processing abilities important for a broad range of differential diagnoses and instructional planning in children and adolescents. A brief form is also available.

Features and benefits

  • Based on PASS (Planning, Attention, Simultaneous, and Successive), a well-researched cognitive/neuropsychological theory.
  • Allows you to determine intra-individual differences with tables that reveal the significance of differences between the four PASS scale standard scores. Difference tables are also provided for scaled subtest scores within each PASS Scale.
  • An Interpretive Worksheet enables you to calculate and record PASS Scale comparisons, first-to-second administration comparisons, and supplemental composite scores and to perform subtest analyses.

Test structure

  • The CAS2 Extended Battery includes three subtests from each of the four PASS scales; the Core Battery includes two subtests from each of the four PASS scales. Each PASS scale as well as the CAS2 Full Scale yields a standard score with a mean of 100 and a standard deviation of 15.
  • Yields five supplemental composite scores: Executive Function without Working Memory, Executive Function with Working Memory, Working Memory, Verbal Content, and Nonverbal Content. A visual versus auditory comparison is also provided.

Technical information

  • Standardized using a group of 1,342 children and adolescents (ages 5-18 years) that closely represents the U.S. population.
  • The 12-subtest Core Battery Full Scale reliability is .95, with PASS Scale reliabilities ranging from .86 to .93. Internal consistency, test-retest, and scorer reliability studies were conducted.
  • Types of validity reported include content-description, criterion-prediction, and construct-identification. Validity with special populations (including persons with speech or language impairment, learning disability, ADHD, anxiety disorder, and Asperger's syndrome and those who are considered gifted and talented) are reported.
  • Special attention was paid to making the CAS2 fair for minority groups. Validity evidence reported in the Interpretive and Technical Manual demonstrates the test's value for assessing diverse groups of children.

Teacher report

  • The CAS2: Rating Scale (for ages 4-18 years) is completed by teachers and generates scores for PASS scales as well as a Total Score.
  • Scores can be used to (a) advocate referrals, supportive services, and special placements; (b) supplement a comprehensive evaluation; (c) compare teachers' ratings with test results; (d) help plan and design academic interventions by revealing behaviors and skills the teacher considers problematic or lacking; and (e) monitor the effectiveness of interventions.
  • Standardized using a group of 1,383 children and adolescents that closely represents the population of the U.S.

Available in Spanish

The CAS2 Spanish Supplement Package includes a U.S. Spanish translation of Chapters 1-3 of the CAS2 Administration and Scoring Manual, a Spanish Expressive Attention and Verbal–Spatial Relations Stimulus Book, and a pack of 10 Spanish CAS2 Examiner Record Forms. Note. Users must own the CAS2 Introductory Kit prior to purchase. This product uses English norms only. 

Online scoring also available

The CAS2 Online Scoring and Report System is an efficient and easy way to obtain CAS2 scores and corresponding narrative. It can be used to convert subtest raw scores into standard scores, percentile ranks, descriptive terms, and age equivalents; generate PASS and Full Scale composite scores; compare CAS2 subtest and PASS scale scores; and get intervention options. A one-year subscription includes unlimited scoring and reports for up to five users.