What is reliability in assessment?
Reliability concerns the consistency of results under comparable assessment conditions.
Key concepts and practice
Item number and quality, differences among raters and testing conditions affect results. Look for consistency across tasks measuring the same skill, without making every item a duplicate. Rubrics and rater training may help.
Examples, evaluation and limits
A measure can consistently capture the wrong thing, so reliability alone does not establish validity. Evidence across tasks and times reduces uncertainty. Interpret scores with possible measurement error in mind.
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