Home › Historical IQ Tests › Das-Naglieri Cognitive Assessment System (CAS)

Documentation · 1997

Das-Naglieri Cognitive Assessment System (CAS): PASS-theory cognitive battery

Cognitive assessment battery built on the PASS theory of intelligence (Planning, Attention, Simultaneous, Successive) - a refinement of Luria's neuropsychological framework. J.P. Das at the University of Alberta and Jack Naglieri at George Mason developed the CAS to provide a Luria-based alternative to the Wechsler and Woodcock-Johnson batteries. The CAS-2 (2014) is in active clinical use, particularly in neuropsychological assessment.

Read About the Test

About the Das-Naglieri Cognitive Assessment System (CAS)

J.P. Das at the University of Alberta spent decades developing what he called the PASS theory of intelligence, an elaboration of Soviet psychologist Alexander Luria's neuropsychological framework. PASS stands for Planning (executive function and strategy), Attention (selective attention and concentration), Simultaneous (holistic visual-spatial processing), and Successive (serial-sequential information processing).

In 1997 Das collaborated with Jack Naglieri at George Mason University to operationalize the PASS theory in a comprehensive cognitive assessment battery. The Cognitive Assessment System (CAS) has 12 subtests organized into the four PASS scales. Each scale produces a standard score; the four can be combined into a Full Scale composite or examined separately as a cognitive profile.

The CAS is particularly valued in neuropsychological assessment because the PASS framework is more directly tied to specific brain systems than the verbal-performance Wechsler framework. It is also valued for assessment of ADHD (where the Planning and Attention scales are diagnostically relevant), learning disabilities (where Successive processing weaknesses can indicate dyslexia patterns), and traumatic brain injury. The CAS-2 (2014) is the current edition.

Copyright note: CAS items are copyrighted. This page documents the battery's history and structure.

The 4 subtests

#1
Planning Scale Matching Numbers, Planned Codes, Planned Connections. Measures strategy generation and use.
Copyrighted
#2
Attention Scale Expressive Attention, Number Detection, Receptive Attention. Measures selective attention.
Copyrighted
#3
Simultaneous Scale Nonverbal Matrices, Verbal-Spatial Relations, Figure Memory. Measures holistic visual-spatial processing.
Copyrighted
#4
Successive Scale Word Series, Sentence Repetition, Speech Rate, Sentence Questions. Measures serial-sequential processing.
Copyrighted

Sample Items (Illustrative)

Items are presented in a variety of formats, including matching, multiple choice, and direct repetition. Scoring is based on accuracy and sometimes speed of response.

Sample 1 · Planning Scale: Matching Numbers
You have a series of numbers: 3, 8, 1, 5, 9. Your task is to match these numbers with the same numbers in a different order as quickly as possible. Match: 1, 9, 3, 5, 8.
Example response: Correct matches: 3-3, 8-8, 1-1, 5-5, 9-9, completed in 20 seconds.
Sample 2 · Attention Scale: Number Detection
In the following sequence of numbers, circle every instance of the number '7': 4, 7, 5, 2, 7, 8, 3, 7, 1.
Example response: Circled numbers: 7, 7, 7.
Sample 3 · Simultaneous Scale: Nonverbal Matrices
Look at the pattern of shapes. Which shape completes the pattern? Options: A) Circle, B) Square, C) Triangle, D) Hexagon.
Example response: Correct option: B) Square.
Sample 4 · Successive Scale: Sentence Repetition
Listen to the sentence and repeat it exactly as you heard it: 'The quick brown fox jumps over the lazy dog.'
Example response: Response: 'The quick brown fox jumps over the lazy dog.'

These are illustrative samples, not actual items from the protected test.

Source

All test materials and historical content on this page are transcribed from:

J.P. Das & Jack A. Naglieri (1997). Das-Naglieri Cognitive Assessment System (CAS).

CAS items remain under Riverside Insights copyright. We document the battery's history.

Cite this page

This page is part of the Historical IQ Tests Archive. Editorial content, transcription notes, and curation are released under Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0). Public-domain primary sources retain their public-domain status. BibTeX · RIS

Historical test materials are obsolete and are not valid modern IQ assessments. This page is preserved for educational, research, and historiographic purposes.

Looking for a contemporary IQ test?

The instrument documented above is a historical document. Modern IQ scoring uses contemporary norms (mean 100, SD 15). Our free full IQ test is available separately.