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Understanding Reliability
Author(s) -
Traub Ross E.,
Rowley Glenn L.
Publication year - 1991
Publication title -
educational measurement: issues and practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.158
H-Index - 52
eISSN - 1745-3992
pISSN - 0731-1745
DOI - 10.1111/j.1745-3992.1991.tb00183.x
Subject(s) - reliability (semiconductor) , consistency (knowledge bases) , index (typography) , interpretation (philosophy) , set (abstract data type) , statistics , test (biology) , internal consistency , reliability engineering , computer science , mathematics , psychometrics , artificial intelligence , engineering , geology , paleontology , power (physics) , physics , quantum mechanics , world wide web , programming language
The topic of test reliability is about the relative consistency of test scores and other educational and psychological measurements. In this module, the idea of consistency is illustrated with reference to two sets of test scores. A mathematical model is developed to explain both relative consistency and relative inconsistency of measurements. A means of indexing reliability is derived using the model. Practical methods of estimating reliability indices are considered, together with factors that influence the reliability index of a set of measurements and the interpretation that can be made of that index.