The use of psi in such a way that the target at which the subject is aiming is “missed” (that is, responded to incorrectly, in a test of extrasensory perception; or influenced in a direction contrary to aim, in a test of psychokinesis) more frequently than would be expected if only chance were operating; the term is also sometimes used, misleadingly, to refer simply to nonsignificant negative scoring. Hence, “psi-misser,” a subject who displays a tendency to psi-miss. Compare Psi-Hitting. [Abbreviated to Ψ M by James Carpenter]