- Reliability is an indication of how precise a student´s score is.
- Test-retest reliability examines the consistency of individual scores across different administrations of a test.
- Parallel-forms reliability evaluates if, indeed, parallel or alternative forms of a test are equivalent.
- Internal reliability is a form of reliability that indicates the degree of consistency in responses across the many items of a single test.
- Split-half reliability is a way to measure the internal consistency of a test by correlating to even halves of the test.
- Coefficient (or Cronbach´s) alpha is a way to measure the internal consistency of a test by averaging all split-half reliabilities.
- Inter-rater reliability refers to the amount of agreement or consistency between two different scorers scoring the same test.
- Inter-rater correlations refer to the correlation between two or more raters scores on items.
- Percentage of agreement refers to the percent of items that two or more raters scored in agreement.
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