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Uses and Abuses of Coefficient Alpha
Psychological assessment, 1996-12, Vol.8 (4), p.350-353
1996
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Details

Autor(en) / Beteiligte
Titel
Uses and Abuses of Coefficient Alpha
Ist Teil von
  • Psychological assessment, 1996-12, Vol.8 (4), p.350-353
Ort / Verlag
Arlington: American Psychological Association
Erscheinungsjahr
1996
Quelle
ERIC
Beschreibungen/Notizen
  • The article addresses some concerns about how coefficient alpha is reported and used. It also shows that alpha is not a measure of homogeneity or unidimensionality. This fact and the finding that test length is related to reliability may cause significant misinterpretations of measures when alpha is used as evidence that a measure is unidimensional. For multidimensional measures, use of alpha as the basis for corrections for attenuation causes overestimates of true correlation. Satisfactory levels of alpha depend on test use and interpretation. Even relatively low (e.g., .50) levels of criterion reliability do not seriously attenuate validity coefficients. When reporting intercorrelations among measures that should be discriminable, it is important to present observed correlations, appropriate measures of reliability, and correlations corrected for unreliability.
Sprache
Englisch
Identifikatoren
ISSN: 1040-3590
eISSN: 1939-134X
DOI: 10.1037/1040-3590.8.4.350
Titel-ID: cdi_proquest_journals_614339182

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