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Reliability reconsidered: Cronbach's alpha and paediatric assessment in occupational therapy [PDF]
Australian Occupational Therapy Journal, 2009 Background / aim: Using reliable outcome measures is a necessity for the occupational therapy profession in enabling valid assessments of clients. Although Cronbach’s alpha is the most widely applied index of internal consistency reliability, there are
Georgia Spiliotopoulou
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, 2021 Cronbach's alpha and omega are units of reliability of a set of items in a questionnaire. We discuss here how to calculate Cronbach's alpha and how to interpret the values.
Arindam Basu
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Making sense of Cronbach's alpha [PDF]
International Journal of Medical Education, 2011 Medical educators attempt to create reliable and valid tests and questionnaires in order to enhance the accuracy of their assessment and evaluations. Validity and reliability are two fundamental elements in the evaluation of a measurement instrument.
Mohsen Tavakol, Reg Dennick
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Robust estimation of Cronbach's alpha [PDF]
Journal of Multivariate Analysis, 2005 Cronbach’s alpha is a popular method to measure reliability, e.g. in quantifying the reliability of a score to summarize the information of several items in questionnaires. The alpha coefficient is known to be non-robust. We study the behavior of this coefficient in different settings to identify situations, which can easily occur in practice, but ...
Andreas Christmann, Stefan Van Aelst
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Geographically Weighted Cronbach's Alpha [PDF]
, 2023 As individual’s cognitions and behaviours are affected by where they live, the reliability of responses to tests or scales may vary with location. In this paper, we develop a local version of Cronbach’s alpha, geographically weighted Cronbach's alpha, to investigate how the reliability of the measure varies spatially.
Zhang Sui, Ziqi Li
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Statistics notes: Cronbach's alpha [PDF]
BMJ, 1997 Many quantities of interest in medicine, such as anxiety or degree of handicap, are impossible to measure explicitly. Instead, we ask a series of questions and combine the answers into a single numerical value. Often this is done by simply adding a score from each answer.
J M. Bland, David Altman
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Alpha Inflation? The Impact of Eliminating Scale Items on Cronbach's Alpha
Organizational Behavior and Human Decision Processes, 1997 In this paper, we study the effect of the elimination of items from a scale so that only those items that correlate highly are chosen. Using a simulation, we estimate the impact on Cronbach's alpha as a function of the total number of items in a scale, the number of items chosen, the true correlation among the items, and the sample size.
Praveen K. Kopalle, Donald R. Lehmann
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An Information-Theoretic Alternative to the Cronbach's Alpha Coefficient of Item Reliability [PDF]
British Journal of Mathematics & Computer Science, 2016 We propose an information-theoretic alternative to the popular Cronbach alpha coefficient of reliability. Particularly suitable for contexts in which instruments are scored on a strictly nonnumeric scale, our proposed index is based on functions of the entropy of the distributions of defined on the sample space of responses.
Ernest Fokoué, Neclâ Gündüz
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A simulation approach on Cronbach's alpha statistical significance
Mathematics and Computers in Simulation, 2006 In this work we propose the use of simulation for the solution of the Cronbach's alpha statistical significance problem. This coefficient measures the reliability of a questionnaire's answers. Many analytical tests have been developed over the years which gave birth to very complicated formulas [2,4,6-9].
Alexandros Leontitsis, Jenny Pagge
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Confidence Intervals for Cronbach's Coefficient Alpha Values [PDF]
, 2003 Coefficient Alpha, which is widely used in empirical research, estimates the reliability of a test consisting of parallel items. In practice it is difficult to compare values of alpha across studies as it depends on the number of items used.
Alex Koning, Philip Hans Franses
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