is the extent to which a test actually measures what it purports to measure. For mental ability tests in corporate settings, this typically comes down to whether the test is a reliable predictor of job performance, training success, and on-the-job decision-making.
: Factor analysis has confirmed that the MD5’s question types (numerical, verbal, and abstract patterns) effectively link to underlying intelligence constructs New York University Predictive Utility
🎯 refers to how accurately the test measures what it claims to measure—in this case, general cognitive aptitude. Construct and Content Validity
Smith, J. (2018). Test-retest reliability of the MD5 Mental Ability Test. Journal of Educational Measurement, 55(1), 61-67. md5 mental ability test reliability and validity
Brown, T. et al. (2018). The relationship between the MD5 Mental Ability Test and cognitive ability: A systematic review. Journal of Intelligence, 6(2), 23.
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Test-retest reliability measures the stability of test scores over time. If a candidate takes the MD5 today and retakes it two weeks later, their scores should remain relatively stable, assuming no significant intervening factors. is the extent to which a test actually
) coefficient or the , given the dichotomous (right/wrong) scoring of the items.
The MD5 is a 57-item, 15-minute test that measures general mental ability, focusing on verbal vocabulary and arithmetic skills. Although it touches upon educational attainment, its primary concern is with a participant’s ability to "deduce relationships and to apply the rules that govern them". The test items are a mixture of verbal/vocabulary problems and numerical relationships, arranged in ascending order of difficulty. As a timed test, the MD5 assesses both the power (difficulty of items one can solve) and the speed (rate of solving) of a candidate.
: Factor analysis has confirmed that the MD5 is unidimensional, effectively capturing general intelligence through verbal, numerical, and arithmetic reasoning. Criterion Validity Construct and Content Validity Smith, J
Like most GMA tests, it is intended to predict job performance. Standardized cognitive tests typically show an operational validity of approximately
It targets fluid intelligence (