The Multidimensional Aptitude Battery II (MAB-II) Test

The Multidimensional Aptitude Battery-II (MAB-II) is a leading standard in the field of intellectual assessment. It has been designed by a renowned psychologist and offers an accurate evaluation of cognitive abilities, commonly known as intelligence quotient (IQ), through a comprehensive set of subtests. This article aims to provide an in-depth understanding of MAB-II, detailing its applications, structure, administration, reliability, and validity.

Overview of MAB-II

The Core Concept

The MAB-II is a comprehensive evaluation tool that measures an individual’s intellectual capabilities. It is built on the premise that aptitude and intelligence can be accurately assessed by examining ten distinct areas of cognitive functioning. These areas are further grouped into two broad categories: verbal and performance.

Developed by psychologist Douglas N. Jackson, this tool is widely used in various professional fields, including business, military, and law enforcement, where it plays a crucial role in the selection and evaluation of candidates. Furthermore, MAB-II is equally valuable in clinical settings, educational and career counselling, and neurological research, offering insights into the relation between cognitive ability and other psychological constructs, job performance, and learning capabilities.

The Structure

The MAB-II consists of ten subtests, each designed to gauge a specific area of cognitive ability. The subtests are categorized under the verbal and performance sections. The verbal section includes subtests like information, comprehension, arithmetic, similarities, and vocabulary. On the other hand, the performance section includes digit symbol, picture completion, spatial, picture arrangement, and object assembly.

The subtests under the verbal section are primarily focused on assessing the individual’s knowledge about diverse topics, ability to analyze social situations, numerical problem-solving skills, and verbal concepts comprehension. The performance section, on the other hand, measures the individual’s ability to learn new coding systems, identify and solve missing elements in pictures, visualize abstract objects in different positions, identify a meaningful sequence from random sequences, and solve left-to-right sequences of disarranged segments.

The Application

The MAB-II is a versatile tool that finds application in a wide range of settings. It is used by psychologists looking for a comprehensive measure of general cognitive ability or intelligence. Simultaneously, it is a valuable resource for individuals looking to assess cognitive ability and aptitudes for employment purposes. Moreover, it is used in research into intelligence and its relation to other psychological constructs, job performance, and learning; neuropsychological assessment and research.

The MAB-II is also available in languages such as Spanish and French, increasing its applicability across diverse groups, including gender, nationality, age, and culture. It can be administered either through computer administration or psychologist administration, taking approximately 50 minutes to complete either the Verbal or Performance subtests.

Deep-Dive into the Subtests

Let’s now delve deeper into the ten subtests that make up the MAB-II, understanding what each subtest aims to measure.

Verbal Section

  1. Information: This subtest assesses the individual’s general knowledge about a wide array of topics.
  2. Comprehension: Here, the ability to analyze social situations, identify appropriate behavior, and explain why certain laws and customs are practiced is gauged.
  3. Arithmetic: This subtest measures the individual’s ability to solve numerical problems, reasoning, and problem-solving abilities.
  4. Similarities: This subtest assesses the ability to recognize, compare, and reason the likeness and differences between individual objects.
  5. Vocabulary: This subtest gauges the learned words, verbal concepts, and the ability to store, categorize, and retrieve information appropriately.

Performance Section

  1. Digit Symbol: This subtest assesses the individual’s ability to learn a new coding system and use it in context.
  2. Picture Completion: Here, the ability to identify and solve missing elements in pictures is evaluated.
  3. Spatial: This subtest gauges the individual’s ability to visualize abstract objects in different positions within a 2-dimensional space.
  4. Picture Arrangement: Here, the individual’s ability to identify a meaningful sequence from a random sequence is assessed.
  5. Object Assembly: In this subtest, the ability to identify an object by solving left-to-right sequences of disarranged segments is measured.

Unpacking the MAB-II Description

The MAB-II is a product of the company SIGMA Assessment Systems Inc. It is designed to measure the intellectual abilities of both adults and adolescents from age 16 and over. The test is used in various settings, such as educational and career counselling, business, industries, clinics, mental health facilities, government, law enforcement, and military.

Despite not being designed with the CHC model (Cattell–Horn–Carroll theory) in mind, studies have found that the test data conform to this model. This makes it a reliable tool for intellectual assessment in diverse scenarios.

Delving into the MAB-II Administration

The MAB-II has specific administration requirements to ensure the integrity of the test results. The tool must be administered in a proctored environment and can be taken through a variety of browsers, including Internet Explorer 9 or later, Edge, Chrome, Firefox, and Opera. It is essential for JavaScript to be enabled on the browser, and a screen width of at least 768 pixels is required.

The MAB-II saves answers at regular intervals throughout each timed test using a background service that requires an authentication cookie. However, if administration is interrupted before the end of the timed test, answers will be lost. It is recommended that the device and browser compatibility be tested before using it for a live administration.

Understanding the MAB-II Reports

The MAB-II provides comprehensive reports that offer extensive insights into the individual’s cognitive ability. There are three different types of reports available:

  1. Basic Report: The basic report provides raw scores, standardized scores, age-corrected scales, and IQ scores for the verbal, performance, and full scale batteries.
  2. Extended Report: In addition to the details in the basic report, the extended report provides additional descriptions.
  3. Clinical Report: The clinical report contains additional interpretive information, along with a graph of subtest patterns and verbal/performance differences.

These reports are instantly available with SigmaSoft for Windows Software and online at, making the MAB-II a convenient tool for instant cognitive assessment.

Assessing the MAB-II Reliability and Validity

The MAB-II has proven to be a reliable and valid measure of general cognitive ability. Test-retest reliabilities on separately timed test administrations have obtained values for total scores of .95 for Verbal, .96 for Performance, and .97 for the Full Scale total scores. The MAB-II Full Scale correlation with one widely used IQ measure is .91, demonstrating its high level of validity.

Exploring the MAB-II Manual

The MAB-II manual contains extensive information about the tool, including scale descriptions, perspectives on intelligence theory and research, and details about the psychometric properties of the MAB-II. This manual serves as a comprehensive guide for administrators, providing valuable insights into the tool’s structure and application.

Looking at MAB-II Pricing

The pricing for the MAB-II varies depending on the specific requirements of the user. Detailed pricing information can be accessed through the official SIGMA Assessment Systems Inc. website.

MAB-II in Different Languages

The MAB-II is available in multiple languages, expanding its reach and applicability across diverse cultural and linguistic groups. Currently, it is available in English, Spanish, and French, thereby catering to a global audience.


In conclusion, the Multidimensional Aptitude Battery-II (MAB-II) is a versatile, reliable, and comprehensive tool for assessing cognitive abilities or intelligence. It finds extensive application in various professional, educational, and clinical settings and offers valuable insights into an individual’s cognitive functioning. Whether you are a psychologist seeking a thorough measure of general cognitive ability, a professional looking to assess cognitive abilities for employment purposes, or a researcher exploring the realm of intelligence, the MAB-II can serve as a valuable tool in your arsenal.