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Psychologists must conduct scientific research to test their hypotheses with accurate tools to measure their results. If a test does not measure the thing that it is designed to measure, then that test is not a valid instrument of measurement. If a test is valid but is not replicable then ...
In science, the idea is similar, but the definition is much narrower. Reliability is a property of any measure, tool, test or sometimes of a whole experiment. It’s an estimation of how much random error might be in the scores around the true score. For example, you might try to weigh...
Drug use test means a scientifically substantiated method to test for the presence of illegal or performance-enhancing drugs or the metabolites thereof in a person’s urine. Locational Deliverability Area Reliability Requirement means the projected internal capacity in the Locational Deliverability Area plu...
The meaning of RELIABILITY COEFFICIENT is a measure of the accuracy of a test or measuring instrument obtained by measuring the same individuals twice and computing the correlation of the two sets of measures.
Test-Retest Reliability A measure of consistency for tests and other instruments. Individuals are asked to take the test of interest and then take the same test again at a later date. The scores are then compared. The closer the scores are, the more reliable the test. Reliability is an ...
This chapter presents a basic definition of test reliability, and describes methods used in estimating the reliability or consistency of test scores. First we describe sources of consistency and inconsistency of test scores. Next we present a short outline of the theory of test reliability. Finally...
Definition and Importance: In research, reliability means "repeatability" or "consistency" and is an important part of measurement quality. A reliable measurement tool should give the same result in multiple measurements. It is the basis of measurement ...
Define Test-retest reliability. Test-retest reliability synonyms, Test-retest reliability pronunciation, Test-retest reliability translation, English dictionary definition of Test-retest reliability. adj. 1. Capable of being relied on; dependable: a reli
re·li·a·bil·i·ty co·ef·fi·cient an index of the consistency of measurement often based on the correlation between scores obtained on the initial test and a retest (test-retest reliability) or between scores on two similar forms of the same test (equivalent-form reliability). ...