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Coefficients Alpha and Reliabilities of Unrotated and Rotated Components
Psychometrika, 1999It has been shown by Kaiser that the sum of coefficients alpha of a set of principal components does not change when the components are transformed by an orthogonal rotation. In this paper, Kaiser's result is generalized. First, the invariance property is shown to hold for any set of orthogonal components. Next, a similar invariance property is derived
Ten Berge, J.M.F., Hofstee, W.K.B.
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Coefficient alpha and related internal consistency reliability coefficients.
Psychological Methods, 2000The author studied the conditions under which coefficient alpha and 10 related internal consistency reliability coefficients underestimate the reliability of a measure. Simulated data showed that alpha, though reasonably robust when computed on n components in moderately heterogeneous data, can under certain conditions seriously underestimate the ...
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Testing Reliability Hypotheses Based on Coefficient Alpha [PDF]
SSRN Electronic Journal, 2008 We show how to test hypotheses for coefficient alpha in three different situations: (1) Hypothesis tests of whether coefficient alpha equals a prespecified value. (2) Hypothesis tests involving two statistically independent sample alphas as may arise when testing the equality of coefficient alpha across groups.
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An Approximate Confidence Interval for Maximum Coefficient Alpha
Multivariate Behavioral Research, 1975An approximate confidence interval is developed for the maximum coefficient alpha reliability of a scale where the scale is considered fixed an persons are sampled.
G W, Joe, J A, Woodward
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Uses and abuses of coefficient alpha.
Psychological Assessment, 1996The 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 ...
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Hall Coefficient of Alpha Plutonium
Physical Review, 1963The Hall coefficient of aipha plutonium was found to be +2.8 x 10/sup - 13/ at 388 c- K and -6.5 x 10/sup -13/ (v-cm)/(A-G) at 78 c- K. The variation between these extreme temperatures was found to change gradually with temperature and the value changes sign at 190 c- K. No field dependence of Hall voltage was found, nor did the application of 11,500 G
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On Coefficient Alpha and the Coefficient of Generalizability
Perceptual and Motor Skills, 1981openaire +1 more source
Coefficient alpha: conceptualizations and anomalies.
Research in nursing & health, 1992In this article distinctions are made among some of the different conceptualizations of, and formulas for, Cronbach's coefficient alpha as it is applied to dichotomous or nondichotomous, standardized or unstandardized, and weighted or unweighted data. Issues regarding the statistical significance of alpha and the occasionally encountered anomalies of ...
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