The MD5 Mental Ability Test by MacKenzie Davey & Co. is a 15-minute, 57-item assessment designed for occupational selection, boasting high internal consistency through item homogeneity. It exhibits strong construct validity as a measure of general mental ability and functions as a predictive tool for job performance. For more detailed information, read the Scribd MD5 Overview .
Williams, B. et al. (2012). Inter-rater reliability of the MD5 Mental Ability Test. Journal of Cognitive Psychology, 24(5), 543-553.
: a high-speed, high-pressure assessment that claims to measure "g" (general intelligence) in just five minutes. But can a test shorter than a coffee break actually tell us how smart someone is? The answer lies in its fascinating balance of reliability and validity. The Sprinter of Psychometrics