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Documentation · 1947 · Military

Army Classification Battery (ACB): Post-WWII Army battery

The post-WWII successor to the AGCT. The ACB replaced the single-score AGCT with a multi-aptitude battery covering verbal, arithmetic, pattern analysis, and several specific occupational aptitudes. The ACB methodology directly led to the modern ASVAB (Armed Services Vocational Aptitude Battery, 1968), which still classifies all US military recruits today.

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About the Army Classification Battery (ACB)

By the end of WWII, the AGCT had been administered to 12 million US service members but its limitations had become apparent. A single overall score was insufficient for the increasingly specialized military occupations - submarine sonarmen, radar technicians, intelligence analysts, and many other roles required specific cognitive aptitudes that the AGCT did not separately measure.

The Army Classification Battery (ACB), introduced in 1947, addressed this. It had multiple aptitude composites: Verbal (VE), Arithmetic Reasoning (AR), Pattern Analysis (PA), Mechanical Aptitude (MA), Clerical Speed (CS), Electronics (EL), and others. Each composite combined several individual subtest scores. The composites allowed Army personnel officers to match recruits to specific military occupational specialties rather than just rank them on a single intelligence dimension.

The ACB methodology was the direct foundation of the modern ASVAB (Armed Services Vocational Aptitude Battery), introduced in 1968 and still in use today across all US military services. About 700,000 ASVAB administrations occur annually. The ACB and ASVAB approach - multiple aptitude composites for occupational placement - has also influenced civilian career assessments and most modern multi-aptitude batteries.

About this interactive version: ACB items were classified during military use and were never publicly released. Only the procedural methodology is in the public domain. The modern ASVAB descendants follow the same general framework but use entirely different items.

The 6 subtests

#1
Verbal (VE) Vocabulary + word knowledge composite.
Classified Items
#2
Arithmetic Reasoning (AR) Quantitative word problems.
Classified Items
#3
Pattern Analysis (PA) Non-verbal reasoning and figure analysis.
Classified Items
#4
Mechanical Aptitude (MA) Tool use, mechanical reasoning, gear systems.
Classified Items
#5
Clerical Speed (CS) Visual scanning and rapid checking.
Classified Items
#6
Electronics (EL) Specific electronics-aptitude items.
Classified Items

Take the full 200-item test

Army Classification Battery (ACB), 1947 - postwar replacement for the AGCT, used to assign Army personnel to MOS specialties. 8 subtests, 200 items in 90 minutes. US government work, public domain.

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About these items: These Army Classification Battery (ACB) items are originally-written reconstructions in the tradition of the original 1947 test, NOT verbatim copies of the historical items. Where the original is a 1-on-1 oral or physical-apparatus test (e.g., examiner shows a card, child draws a shape), we have adapted the format to self-administered multiple choice.

Sample Items (Illustrative)

Items are presented as multiple-choice or short-answer questions, scored based on accuracy and speed of response.

Sample 1 · Verbal (VE)
Choose the word that best completes the sentence: 'The soldier displayed great _______ in the face of danger.'
Example response: courage
Sample 2 · Arithmetic Reasoning (AR)
If a convoy travels 60 miles in 1.5 hours, what is its average speed in miles per hour?
Example response: 40 mph
Sample 3 · Pattern Analysis (PA)
Look at the sequence of shapes: square, circle, triangle, square, circle. What shape comes next?
Example response: triangle
Sample 4 · Mechanical Aptitude (MA)
When a gear with 12 teeth meshes with a gear with 24 teeth, how many revolutions will the smaller gear make when the larger gear makes one full revolution?
Example response: 2 revolutions
Sample 5 · Clerical Speed (CS)
Quickly scan the list and identify the number of times the word 'report' appears: report, file, document, report, memo, report.
Example response: 3
Sample 6 · Electronics (EL)
Which component is used to store electrical energy in a circuit?
Example response: capacitor

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

Source

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

U.S. Army (1947). Army Classification Battery (ACB).

The ACB items were classified during military use; only procedural documents are public. The methodology is described in various US Army technical manuals from the late 1940s and early 1950s.

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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 · CSL JSON

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

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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.