Depending on the criteria of judgment employed, tests exhibit a number of different kinds of validity.Įmpirical validity (also called statistical or predictive validity) describes how closely scores on a test correspond (correlate) with behaviour as measured in other contexts. Since the person who draws inferences from a test must determine how well it serves his purposes, the estimation of validity inescapably requires judgment. A test is reliable to the extent that it measures consistently, but reliability is of no consequence if a test lacks validity. The primary requirement of a test is validity-traditionally defined as the degree to which a test actually measures whatever it purports to measure. Primary characteristics of methods or instruments SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.

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Reliability in psychological testing