Measurement: Reliability and Validity
1Reliability & Validity -1Measurement: Reliability and ValidityY520 Strategies for Educational InquiryRobert S MichaelReliability & Validity -2Introduction: Reliability & Validity All measurements, especially measurements of behaviors, opinions, and constructs, are subject to fluctuations (error) that can affect the measurement s Reliability and Validity . Reliabilityrefers to consistencyor stabilityof measurement. Can our measure or other form of observation be confirmed by further measurements or observations? If you measure the same thing would you get the same score? Validityrefers to the suitabilityor meaningfulnessof the measurement.
7 Reliability & Validity-13 Content Validity Is a judgment of how appropriate the items seem to a panel of reviewers who have knowledge of the subject matter. • Does the instrument include everything it should and nothing it
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