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Test Reliability—Basic Concepts

Test reliability Basic Concepts Samuel A. LivingstonJanuary 2018 Research Memorandum ETS RM 18-01 ETS Research Memorandum SeriesEIGNOR EXECUTIVE EDITORJ ames CarlsonPrincipal PsychometricianASSOCIATE EDITORSB eata Beigman KlebanovSenior Research ScientistHeather BuzickSenior Research ScientistBrent BridgemanDistinguished Presidential AppointeeKeelan EvaniniResearch DirectorMarna Golub-SmithPrincipal PsychometricianShelby HabermanDistinguished Research Scientist, EdusoftAnastassia LoukinaResearch ScientistJohn MazzeoDistinguished Presidential AppointeeDonald PowersPrincipal Research ScientistGautam PuhanPrincipal PsychometricianJohn SabatiniManaging Principal Research ScientistElizabeth StoneResearch ScientistRebecca ZwickDistinguished Presidential AppointeePRODUCTION EDITORSKim FryerManager, Editing Ser

If you take a test on a day when you are alert and able to concentrate, your score is likely to be higher than it would be if you took it on a day when you were drowsy or distracted. On most tests, the questions or problems that the test taker is confronted with are not the ... S. A. Livingston Test Reliability—Basic Concepts. ...

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