Machiavellianism is also a term that some social and personality psychologists use to describe a person's tendency to deceive and manipulate other people for their personal gain. In the 1960s, Richard Christie and Florence L. Geis developed a test for measuring a person's level of Machiavellianism. This eventually became the MACH-IV test, a twenty-statement personality survey that is now the standard self-assessment tool of Machiavellianism. People scoring above 60 out of 100 on the MACH-IV are considered high Machs; that is, they endorsed statements such as, "Never tell anyone the real reason you did something unless it is useful to do so," (No. 1) but not ones like, "Most people are basically good and kind" (No. 4). People scoring below 60 out of 100 on the MACH-IV are considered low Machs; they tend to believe, "There is no excuse for lying to someone else," (No. 7) and, "Most people who get ahead in the world lead clean, moral lives" (No. 11). Christie, Geis, and Geis's graduate assistant David Berger went on to perform a series of studies that provided experimental verification for the notion of Machiavellianism.

High Mach, low Mach. Love it.

Ease up on the mach there, bro.