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validity

Having legal force

The degree to which the results of a study are likely to be true, believable and free of bias This is entirely independent of the precision of the results (p value) and does not predict the of the results to your patients For a detailed discussion of validity, click HERE

This definition is from the the North Central Regional Educational Laboratory http: //www ncrel org: "An indication of how well an assessment actually measures what it is supposed to measure A valid assessment measures what it is supposed to measure and not extraneous features For example, a valid assessment of mathematics problem solving would be to measure the student's ability to solve a problem, and not the ability to read the problem " See Related Resources

Statistical technique used to determine if a test is actually measuring what it is intended to measure

The validity of something such as a result or a piece of information is whether it can be trusted or believed. Shocked by the results of the elections, they now want to challenge the validity of the vote Some people, of course, denied the validity of any such claim. see also valid. In logic, the property of an argument consisting in the fact that the truth of the premises logically guarantees the truth of the conclusion. Whenever the premises are true, the conclusion must be true, because of the form of the argument. Some arguments that fail to be valid are acceptable on grounds other than formal logic (e.g., inductively strong arguments), and their conclusions are supported with less than logical necessity. Where the support yields high probability of the conclusion relative to the premises, such arguments are sometimes called inductively valid. In other purportedly persuasive arguments, the premises actually provide no rational grounds for accepting the conclusion; such defective forms of argument are called fallacies (see fallacy, formal and informal)

The degree to which an assessment method measures what it is supposed to measure

The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection

The degree to which a variable's operationalisation accurately reflects the concept it is intended to measure

the quality of being logically valid

The extent to which a test, experiment, or measuring procedure actually assesses what it was designed to assess

The extent to which a test accurately measures what it is intended to measure The three major types of validity are content, construct, and criterion-related

The degree to which a variable measures what it is intended to measure

The degree to which a measurement actually measures or detects what it is supposed to measure

The extent to which test scores actually reflect what they were meant to measure Validity occurs when the assessment procedure measures the performance described in the objective, that is what it claims to measure

The degree to which evidence and theory support the interpretation of test scores entailed by proposed uses of tests The process of validation involves accumulating evidence to provide a sound scientific basis for the proposed score interpretations It is the interpretations of test scores for proposed uses that are evaluated, not the test itself Example: If a student performs poorly on a reading test, how confident are we that this score indicates poor reading ability? How confident are we that a low reading score requires special educational interventions **

An indication that an assessment instrument consistently measures what it is designed to measure, excluding extraneous features from such measurement

The ability of a feedback instrument to measure what it was intended to measure; also, the degree to which inferences derived from measurements are meaningful

The extent to which a measurement instrument actually measures what it is designed to measure

The extent to which an assessment measures what it is supposed to measure and the degree to which inferences and actions based on student performance are appropriate For example, if a student performs well on a reading test, how confident are we that that student is a good reader? A valid standards-based assessment is aligned with the standards intended to be measured, provides an accurate and reliable estimate of students' performance relative to the standard, and is fair

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