Das-Naglieri Cognitive Assessment System

CATEGORY: Ability

AUTHORS: Dr. J.P. Das, Dr. Jack A. Naglieri

RANGE: Ages 5 to 18 years

SUMMARY

A new way of thinking about intelligence... A new way to measure it

The Das-Naglieri Cognitive Assessment System (CAS) is a norm-referenced measure of intelligence based on the PASS theory of cognitive processing. PASS consists of four cognitive components: Planning, Attention Simultaneous, and Successive processes. These are cognitive functions which form a complex and interdependent system. The CAS is appropriate for use with individuals between the ages of five and eighteen years.

The CAS is organized into four sections representing the PASS model:

• Planning refers to a process involved in nonroutine selection of programs for action, labeled as supervisory attentional system. Planning consists of programming, regulation, and verification of behaviour. Planning is a set of decisions or strategies an individual adopts and modifies to solve a problem and to reach a goal. Planning tasks in the CAS require an individual to develop some approach of solving the task in an efficient and effective manner.
• Attention implies that the individual is alert. Alertness can be sustained for a period of time and is selective. Arousal, or alertness, is a prerequisite for learning and memory. Attention tasks in the CAS require the individual to selectively attend to one and ignore the other aspect of a two dimensional stimulus.
• Simultaneous processing refers to the person's facility in relating and integrating discrete pieces of information. Simultaneous tasks in the CAS require the individual to interrelate the component parts of a particular item to arrive at the correct answer. The relationship between all the component parts must be incorporated into some complete pattern or idea.
• Successive processing refers to the person's ability to keep things in a particular order. Successive tasks in the CAS require the individual to either reproduce a particular sequence of events or answer some questions that require correct interpretation of the linearity of events.

There are thirteen subtests organized as follows:

Planning

Test 1: Matching Number	Task: Find the 2 that are the same
Test 2: Planned Codes	Task: Fill in symbols matched to letters
Test 3: Planned Connections	Task: Connect a series in sequence

Attention

Test 7: Expressive Attention	Task: Requires suppression of visual image to verbalize correct response
Test 8: Visual Selective Attention	Task: Underline numbers that match stimulus
Test 9: Receptive Attention	Task: Underline pairs that match

Simultaneous

Test 4: Matrices	Task: Select 1 of 6 options that best completes matrix
Test 5: Simultaneous Verbal	Task: Choose picture (I of 6) that answers verbal question
Test 6: Figure Memory	Task: View stimulus for 5 seconds find & trace it in embedded figure

Successive

Test 10: Word Series	Task: Repeat string of words in order
Test 11: Sentence Repetition	Task: Repeat sentences that have syntax but reduced meaning
Test 12: Sentence Questions	Task: Answer questions about statements
Test 13: Speech Rate	Task: Repeat series of words 10 times fast

MAJOR FEATURES

• Measures Attention & Planning
• Data on 2,800 subjects
• Provides an alternative to traditional IQ measures
• Cognitive processing assessment - Cognitive processes are a better conceptualization of IQ
• Theory is based on research
• Sensitive to differential diagnosis - Helps you see "why" there is a problem (other IQ tests don't)
• Easy to Administer
• Easy to Score
• Yields: scaled scores, standard scores, percentile ranks, age equivalents
• Three interpretation levels: composite, four processing scales and 13 subtests
• Optional scoring & reporting program
• Optional videotape
• Linked to physical structures of the brain
• Tests should follow theory not current tests
• Discriminant validity evidence

QUALIFICATIONS

First time test purchasers, other than officially recognized universities and health institutions, are required to furnish evidence of qualification. Please include a signed document indicating your educational background, licences, credentials, certificates and membership in related professional organizations. For more detailed information, see Purchasing Test Product.

THE AUTHORS

Dr. Jack A. Naglieri Professor, School Psychology Coordinator, School Psychology Training Program Ohio State University

Dr. J.P. Das Professor, Educational Psychology Director, Developmental Disabilities Centre University of Alberta

COMPONENTS

The Complete CAS Test Kit includes: Administration and scoring manual, Interpretive Handbook Stimulus Book, 10 test records, 5 response books for ages 5 through 7, 5 response books for ages 8 through 17, 10 response books for figure memory, scoring templates, 2 red pencils, carrying case. The kit includes sufficient materials to test 10 subjects, 5 at each age range.

TITLE	ISBN	PRICE (Cdn. $)
Complete CAS Kit with carrying case	1036302	$1348.00
Complete CAS Kit without carrying case	1036334	$1195.00
Test Records - Ages 5-17 (Pkg. 25)	1036335	$67.75
Response Books - Ages 5-7 (Pkg. 25)	1036336	$42.90
Response Books - Ages 8-17 (Pkg. 25)	1036337	$42.90
Figure Memory Response Books - All ages (Pkg. 25)	1036338	$42.90
Interpretive Handbook	1036849	$111.95
Administration and Scoring Manual	1036850	$111.95
Multi-pack of Forms (10 Record Forms; 5 Response Books Ages 5-7; 5 Response Books Ages 8-17; 10 Figure Memory Response Books)	1036339	$57.35
Scoring Templates	1036340	$24.05
University Training CD-ROM	1036851	$66.60

Prices are in effect January 2, 2007.

 

CAS RAPID SCORE SOFTWARE

CAS Rapid Score scoring and reporting software (no included in CAS kits) is a valuable program that will help you score the CAS quickly and easily. Scaled scores are immediately calculated based on entry of raw scores, and a narrative summary report may be generated that allows for on-screen editing, copying and pasting, or exporting to a text file. Comparisons of values obtained from the CAS and a variety of achievement tests are also provided. Cases may be stored and easily retrieved as necessary.

Minimum System Requirements: Windows 95 / 98 / NT / 2000 / ME, CD-ROM drive, monitor with 800 x 600 resolution

COMPONENTS	ISBN	PRICE (Cdn. $)
CAS Rapidscore Software (CD-ROM)	9-23104	$321.00

Prices are in effect January 2, 2007.

 

CAS UNIVERSITY TRAINING CD ROM

Designed for use by university trainers of psychology, this package includes all the information an instructor needs to become familiar with the Das-Naglieri Cognitive Assessment System, including the PASS theory of intelligence. The CD works on both Windows and Macintosh and will aid instructors teaching the CAS to their students.

The CD ROM features presentation materials, video of authors, sections from the Interpretive Handbook, and more. The CAS presentation materials are also provided in a PowerPoint format, allowing instructors to customize materials. The author video covers the test's underlying theoretical bases and answers questions concerning its development, administration, and interpretation.

COMPONENTS	ISBN	PRICE (Cdn. $)
CAS University Training CD-ROM (Windows and Macintosh)	9-20526	$66.60

Prices are in effect January 2, 2007.