The term 'internal consistency'has been used extensively in classical psychometrics to refer
to the reliability of a scale based on the degree of within-scale item intercorrelation, as …

As pointed out by Sijtsma (in press), coefficient alpha is inappropriate as a single summary
of the internal consistency of a composite score. Better estimators of internal consistency are …

Confusion in the literature between the concepts of internal consistency and homogeneity
has led to a misuse of coefficient alpha as an index of item homogeneity. Coefficient alpha is …

The term “internal consistency” has been widely used but controversially defined. Cronbach
(1951) used the terms “internal consistency” and “homogeneity” interchangeably stating that …

Briggs and Cheek (1986) have suggested that the mean of inter-item correlations for a scale
provides information about whether that scale is unidimensional or not. More information …

The relationship between Cronbach's coefficient alpha (a) and the reliability of a composite
of a prespecified set of interrelated nonhomogeneous components is examined. It is shown …

The author studied the conditions under which coefficient alpha and 10 related internal
consistency reliability coefficients underestimate the reliability of a measure. Simulated data …

A long time ago Cronbach's (1951) α was proposed for investigating the quality of a
measure in the framework of classical test theory. Cronbach's α is considered an indicator of …

Cronbach's α is the most widely used index of the reliability of a scale. However, its use and
interpretation can be subject to a number of errors. This article discusses the historical …

A coefficient derived from communalities of test parts has been proposed as greatest lower
bound to Guttman's “immediate retest reliability.” The communalities have at times been …