Perceptual and Motor Skills · 1994 · 14 citations · 6 references
EducationEducational MeasurementPsychologyItem Response TheoryPsychometricsScale DevelopmentInternal ConsistencyItem AnalysisItem Characteristic CurvesMeasurement ErrorReliabilityTest ReliabilityCoefficient AlphaInternal Consistency ReliabilityItem ReliabilityLikert-type ItemsPsychometric ReliabilityQuestionnaire ReliabilityReliability EvidenceResponse Consistency
The purpose of this study was to examine the effects on Cronbach coefficient alpha, an estimate of internal consistency reliability, of altering the number and type of item-response choices on measures administered to two independent samples ( ns, 492 and 730). An increase in the number and type of response choices (from true/false format to four-choice Likert-type format) significantly increased the internal consistency reliability estimate.
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Coefficient Alpha and the Internal Structure of Tests
Lee J. Cronbach · Psychometrika · 1951 · 43.2K citations · Full text
Social Sciences, Educational Assessment, Educational Measurement +14