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Direct linkWaller, Niels G. – Applied Psychological Measurement, 2008
Reliability is a property of test scores from individuals who have been sampled from a well-defined population. Reliability indices, such as coefficient and related formulas for internal consistency reliability (KR-20, Hoyt's reliability), yield lower bound reliability estimates when (a) subjects have been sampled from a single population and when…
Descriptors: Test Items, Reliability, Scores, Psychometrics
Theunissen, Phiel J. J. M. – 1983
Any systematic approach to the assessment of students' ability implies the use of a model. The more explicit the model is, the more its users know about what they are doing and what the consequences are. The Rasch model is a strong model where measurement is a bonus of the model itself. It is based on four ideas: (1) separation of observable…
Descriptors: Ability Grouping, Difficulty Level, Evaluation Criteria, Item Sampling
