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What is test validity and test validation? Tests themselves are not valid or invalid. Instead, we validate the use of a test score.
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Validity is a matter of degree, not all or none. ,[object Object]
Tests sample behavior; they don't measure it directly. ,[object Object]
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Reliability is not enough; a test must also be valid for its use. ,[object Object]
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This analogy makes it clear that determining the reliability of a test is an important first step, but not the defining step, in determining the validity of a test.
Reliability Is the degree to which an assessment tool produces stable and consistent results.
Test reliability ,[object Object]
Test-retest reliability ,[object Object],[object Object]
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Correlation ,[object Object]
Determining the Correlation Coefficient  ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
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Alternate Forms ,[object Object]
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Inter-rater ability ,[object Object],[object Object],[object Object]
Internal consistency reliability ,[object Object]
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Why use Split-Half? ,[object Object]
How do I use Split-Half ? ,[object Object],[object Object],[object Object]
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Validity Refers to how well a test measures what it is purported to measure.
Why is it necessary? ,[object Object]
Types of Validity
Face Validity ,[object Object]
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Construct Validity ,[object Object]
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Criterion-Related Validity ,[object Object]
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Formative Validity ,[object Object]
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Sampling Validity ,[object Object]
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Some ways to improve validity ,[object Object],[object Object],[object Object],[object Object]
How do we use simple test analysis on our school.

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Reliability and validity

  • 1. What is test validity and test validation? Tests themselves are not valid or invalid. Instead, we validate the use of a test score.
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  • 10. This analogy makes it clear that determining the reliability of a test is an important first step, but not the defining step, in determining the validity of a test.
  • 11. Reliability Is the degree to which an assessment tool produces stable and consistent results.
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  • 40. Validity Refers to how well a test measures what it is purported to measure.
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  • 54. How do we use simple test analysis on our school.