Calibrated Neuropsychological Normative System cnns

For: Assist in the interpretation of test scores
Reading Level: 18 to 90 years
Format: Paper-and-Pencil; PC Based Software
Length: 5-10 minutes to score using the CNNS-SP
Scoring: Computer Scored



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CNNS Introductory Kit

Kit includes CNNS Professional Manual and 50 Record Forms.
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David J. Schretlen, PhD, S. Marc Testa, PhD, and Godfrey D. Pearlson, MD


The CNNS is designed to assist clinicians and researchers in their interpretation of the tests that make up its normative system.  Raw scores are used to generate scaled scores, T scores, and percentiles for 73 measure and factor scores derived from 24 tests. Six summary or factor scores were constructed (Processing Speed, Attention/Working Memory, Verbal Learning and Memory, Visual Learning and Memory, Ideational Fluency, and Executive Functioning) from various measures within the tests. Twenty-two discrepancy scores are provided, along with significance tests and cumulative frequency analyses for the obtained differences to assess the examinee’s unique and relative strengths and weaknesses.

Through the use of regression-based norms, users can calibrate CNNS test scores in the software using eight different combinations of demographic variables (i.e., age, sex, education, race) and estimated “premorbid” IQs based on the Hopkins Adult Reading Test (HART).  Because calibrating scores in this way accounts for variation in test performance that is attributable to individual differences in demographic background and estimated premorbid IQ, the precision of neuropsychological test interpretation is increased.  In addition, the CNNS provides normative information for widely used neuropsychological measures.  This co-normed approach provides you with greater confidence that differences in performance across cognitive domains reflect true cognitive strengths and weaknesses for a given examinee.  All the tests normed by the CNNS were administered to adults who participated in a single study of normal aging.  The Record Form enables you to easily record and convert scores for all 73 measure and factor scores.

The Professional Manual provides age-based norms; the CNNS-SP provides norms based on eight different combinations of demographic variables and premorbid IQ.

Calibrated Neuropsychological Normative System Software Portfolio (CNNS-SP)

The CNNS-SP is an unlimited-use computer based software program that facilitates the conversion of scores for the tests normed by the CNNS.  After you input the respondent’s demographic and raw score information, the program automatically computes the selected demographically calibrated T scores and factor scores. The software also classifies each score qualitatively (e.g., average, borderline, mildly abnormal). The computer based software enables the clinician to choose which set of prediction equations to use for report generation.  Eight different combinations of demographic information and premorbid IQ are available. Finally, it allows for batch importing and exporting of data to facilitate research application.

Tests Calibrated by the CNNS-SP





















System Requirements

Windows  XP, Vista, 7, 8 and 10.

Mac users: install Windows in VirtualBox or BootCamp.

Other virtual machine solutions (e.g., Parallels, VMWare) are not supported.


NTFS File System; CD-ROM drive for installation; Internet connection or telephone for activation

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