by Robert A. Stern, PhD and Travis White, PhD
The NAB Provides an Efficient, Comprehensive Assessment of Attention, Language, Memory, Spatial Processing, and Executive Functions in Less Than 4 Hours...
The NAB is a comprehensive, integrated, modular battery of 33 new neuropsychological tests developed to assess a wide array of neuropsychological skills and functions in adults (ages 18-97 years) who have known or suspected disorders of the central nervous system. The individual tests are grouped into six modules: Attention, Language, Memory, Spatial, Executive Functions, and Screening (which allows the clinician to determine which of the other five domain-specific modules are appropriate to administer to an individual patient).
The NAB has excellent psychometric properties, includes extensive normative and validation data, provides clinical information that meets the needs of a broad range of modern referral sources, and offers two equivalent forms that reduce practice effects and facilitate reevaluation. The examiner can administer the entire NAB for a comprehensive evaluation of neuropsychological functioning in less than 4 hours.
The NAB was created and developed over a 7-year period and was funded, in part, through grants from the National Institute of Mental Health. Decisions pertaining to the content and format of the NAB were guided by the results of the publisher's national survey of neuropsychological assessment practices and needs, as well as by the feedback and guidance of members of the NAB Advisory Council (a group of experts recognized nationally in the field of clinical neuropsychology) and numerous other consultants and contributors.
NAB Advisory Council
A Closer Look at the NAB...
NAB Modules Provide the Flexibility Needed to Help You Meet the Time Constraints and the Different Areas of Clinical Focus Required for Each Individual
Depending on which modules are administered, the NAB yields a variety of differenT scores. Each NAB test (with the exception of the Screening and Attention Modules Orientation test and the Language Module Reading Comprehension test) results in one or more primary tesT scores and, in some cases, additional secondary and/or descriptive tesT scores. For the Screening Module, selected primary test T scores are summed to obtain each of the Screening Domain scores (e.g., the two Screening Language tesT scores compose the Screening Language Domain score). The five Screening Domain scores are summed to obtain the Total Screening Index score.
For each main module, a module Index score is calculated from the sum of selected primary T scores from that module; this score summarizes the examinee's performance on that module. The Total NAB Index is based on the sum of the five main module Index scores, representing the examinee's overall performance on the NAB. The Neuropsychological Assessment Battery® Software Portfolio (NAB®-SP) provides unlimited scoring and report generation after hand-entry of an individual's NAB tesT scores.
NAB Reliability and Validity Studies
In addition to the standardization study of more than 1,400 adults, the NAB has undergone extensive reliability studies, including equivalent form, interrater, 6-month test-retest, and internal consistency.
The two forms of the NAB were found to be highly equivalent in an equivalent-form reliability study (n = 50). Interrater reliability studies conducted on those NAB tests that require more subjective scoring indicated excellent agreement. A 6-month test-retest study (n = 95) resulted in very good temporal stability and provides important practice-effect information. Internal consistency analyses also indicate excellent reliability. The reliability estimates for the NAB Index scores are excellent. For example, the reliability coefficient for the Total NAB Index score is .96.
Extensive validation evidence has been established through both exploratory and confirmatory factor analyses, criterion validity investigations, and several clinical validation studies (including separate studies involving groups of patients with dementia, aphasia, traumatic brain injury, attention-deficit/hyperactivity disorder, multiple sclerosis, and HIV/AIDS). Additional validity studies included a comparison of the NAB with measures of functional independence in an inpatient rehabilitation hospital and an investigation involving a group of simulated malingerers who received the NAB, along with several existing measures of symptom validity.
Using the NAB in Your Practice
As a comprehensive neuropsychological test battery, the NAB is appropriate for outpatient evaluation, forensic examination, large-scale research studies, and many other clinical and research applications. Because of its modular flexibility, its potential for focused and shorter examination times, and the ability to use the Screening Module on its own, the NAB also is appropriate for inpatient bedside consultations, interdisciplinary team evaluations, memory disorder clinic examinations, and focused research investigations, among other purposes.
The NAB allows for both flexible battery and fixed battery approaches to assessment. You can administer the entire NAB, selected modules, or individual NAB tests based on specific needs, examination focus, and referral question(s). Standardized administration and scoring procedures across all tests enhance the consistency and interpretability of tesT scores. The NAB is unique among modern neuropsychological test batteries in that all of the tests in all of the modules have been co-normed on the same individuals.
NAB Software Portfolio (NAB-SP)
The NAB-SP automates many of the steps involved in calculating raw scores as well as obtaining normative scores (e.g., z scores, Tscores, percentiles) and generating profiles, all in a fraction of the time required by hand scoring. It includes built-in, easy-to-use report editing features, and it generates profile graphs with the ability to overlay profiles from prior NAB administrations for a specific client. Reports can be exported to common word processing programs, and client data can be exported to many spreadsheet and database programs. The NAB-SP now includes the NAB Main Modules Primary Score Report. Click here to download a patch for your existing NAB-SP to enable it to produce this report.
NAB Training Program on DVD
The Training Program on the Administration and Scoring of the NAB Module Kit is designed to facilitate learning the correct administration and scoring procedures for the NAB Module you have purchased. The specific module DVD contains an overview of the module you ordered; it is organized into chapter titles that correspond to the individual tests within the module, thus facilitating easy navigation to information about a specific test. Each chapter includes an overview of the specific test followed by a demonstration of a standard administration. Procedures for recording and scoring responses also are described. A set of completed NAB Record Forms and Response Booklets for the specific module you ordered, corresponding to the actual administration shown in the video clips, is included with the DVD set. In addition, the Screening Module DVD is included as a complimentary bonus because it includes an overview of the entire NAB. Together, these materials facilitate learning the correct administration, recording, and scoring procedures.
Note: If you are purchasing a NAB module kit--with the exception of the Screening Module--we strongly recommend that you also purchase the NAB Administration, Scoring, and Interpretation Manual (Item #WW-5088-TM) and the NAB Demographically Corrected Norms Manual (Item #WW-5091-TM). All kits include the NAB Video Training Program DVD and the NAB-SP.
Kit Includes Executive Functions Module Form 1 [Stimulus Book, 25 Record Forms, 25 Response Booklets] Executive Functions Module 2 [Stimulus Book, 25 Record Forms, 25 Response Booklets], NAB-SP with on screen help and quick start guide, and video training program- DVD
This product was added to our catalog on Monday 07 June, 2010.