Test performance can be influenced by a person's psychological or physical state at the time of testing. Test taker's temporary psychological or physical state.How do we account for an individual who does not get exactly the same test score every time he or she takes the test? Some possible reasons are the following: If a person takes the test again, will he or she get a similar test score, or a much different score? A test that yields similar scores for a person who repeats the test is said to measure a characteristic reliably. Test reliability Reliability refers to how dependably or consistently a test measures a characteristic. For example, an arithmetic test may help you to select qualified workers for a job that requires knowledge of arithmetic operations.The degree to which a test has these qualities is indicated by two technical properties: reliability and validity. By using the test, more effective employment decisions can be made about individuals.In other words, the test measures one or more characteristics that are important to the job. For example, a test of mental ability does in fact measure mental ability, and not some other characteristic. The test measures what it claims to measure.This means that if a person were to take the test again, the person would get a similar test score.
#VALIDITY AND RELIABILITY OF INSTRUMENTS HOW TO#
How to interpret validity information from test manuals and independent reviews.Using validity evidence from outside studies.
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