History
The ASVAB was first introduced in 1968 and was adopted by all branches of the military in 1976. In 2002 it underwent a major revision. In 2004, the test's percentile ranking scoring system was re-normalized, to ensure that a score of 50% really did represent doing better than exactly 50% of test-takers.
Read more about this topic: Armed Services Vocational Aptitude Battery
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