Transcription of Chapter 3 Psychometrics: Reliability & Validity
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Chapter 3 Psychometrics: Reliability & Validity
Chapter 3 Psychometrics: Reliability & Validity 45 Measuring learning & Performance: A Primer | Retrieved from Chapter 3 Psychometrics: Reliability & Validity The purpose of classroom assessment in a physical, virtual, or blended classroom is to measure ( , scale and classify) examinees knowledge, skills, and/or attitudes. For example in achievement testing, one measures, using points, how much knowledge a learner possesses (called scaling) and then his or her total raw point score equates to a grade, , A, B, C, etc. (called classifying). In this Chapter , we will consider essential attributes of any measuring device: Reliability and Validity . Classical Reliability indices ( , test-retest [stability], parallel forms [equivalence], internal consistency, and inter-rater) are most routinely used in classroom assessment and are hence, discussed.
Chapter 3 Psychometrics: Reliability & Validity 46 Measuring Learning & Performance: A Primer | Retrieved from CharlesDennisHale.org One expects the correlation between responses to each test item to be
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