Understanding Reliability and Coefficient alpha, Really

By T. Bruce. 2003

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Cronbach’s Coefficient Alpha (2015, background): “Prestigious psychometricians refer to alpha as ‘‘a measure of internal consistency’’ (Nunnally & Bernstein, 1994, p. 290) or ‘‘an internal consistency estimate’’ (Thompson, 2003, p. 10).”
The Reliability and Validity of Zimbardo Time Perspective Inventory Scores in Academically Talented Adolescents (2007, methodology): “Confidence intervals calculated using the SPSS syntax provided by Thompson (2003) indicated that the internal consistency estimates for some Past Positive scores may have been less than .50.”
Two Approaches for Correcting Correlation Attenuation Caused by Measurement Error: Implications for Research Practice (2003, background): “More recently, Yin and Fan (2000) reported that only about a dismal 8% of the published studies involving the use of the Beck Depression Inventory actually reported reliability coefficients for their own data.”
Two Criteria for Good Measurements in Research: Validity and Reliability (2017, background): “The researchers often not only fail to report the reliability of their measures, but also fall short of grasping the inextricable link between scale validity and effective research [Thompson, 2003].”