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Cognitive Assessment System TM- Second Edition (CAS2)

The Cognitive Assessment SystemTM – Second Edition (CAS2; Naglieri & Das, 2014) measures cognitive processing abilities based on the cognitive/neuropsychological theory known as PASS (Planning, Attention, Simultaneous, and Sucessive).


The CAS2 is an individually administered measure of cognitive ability designed to assess Planning, Attention, and Simultaneous, and Successive (PASS) processes in individuals 5 years to 18 years, 11 months old. Planning tasks require the test taker to develop an approach to solving a task in an efficient and effective manner. Attention tasks require the individual to selectively attend to one and ignore the other aspect of a two-dimensional stimulus. Simultaneous tasks require the individual to interrelate the component parts of a particular item to arrive at the correct answer. Finally, successive tasks require the individual to either reproduce a particular sequence of events or answer questions that require correct interpretation of the linearity of events.

There are eight subtests in the Basic Battery and 12 subtests in the Standard Battery. The CAS2 may be used for diagnosis, eligibility, determination of discrepancies, reevaluation, and instructional planning.


Author (yr) Age Range (yrs) Method of Administration/Format Approx. Time to Administer Subscales
Cognitive Assessment System – Second Edition (CAS2) Naglieri & Das (2014) Cognitive Assessment System (CAS) Naglieri & Das (1997) 5-18

Individually administered, norm-referenced measure of cognitive processes, based on PASS Theory (Planning, Attention, Simultaneous & Successive); two batteries (basic, standard)

Yields scaled scores, standard scores, percentiles, age equivalents
Basic battery, 45 min.; Standard battery, 60 min.

13 subtest scaled scores

4 processing scales: Planning (Matching Number, Planned Codes, Planned Connections); Attention (Expressive Attention, Visual Selective Attention, Receptive Attention); Simultaneous (Matrices, Simultaneous Verbal, Figure Memory); and Successive (Word Series, Sentence Repetition, Sentence Questions, Speech Rate)

5 Supplemental Composite Scores: Executive Function without Working Memory, Executive Function with Working Memory, Working Memory, Verbal Content, and Nonverbal Content.

Provides a visual vs. auditory comparison.

Availability: Riverside Publishers,

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