What are the challenges of assessing the reliability of difference scores?

That means that the Cronbach's alpha of this scale would drop from .741 to .690 if you got rid of that item. Because a higher alpha indicates more reliability, ... Internal reliability was reported using both Cronbach's alpha and ordinal alpha. The DASS-21 and EPDS ability to discriminate cases from non-cases was ... We construct a robust version of Cronbach's alpha which is insensitive to a small proportion of data that belong to a different source. May 18, 2021 ... Cronbach's alpha is a measure used to estimate the reliability, or internal consistency, of a composite score or test items. In statistics, Cronbach's alpha coefficient is used as an estimate of the reliability of a psychometric test. It might have calculated either for each item in ... Oct 17, 2017 ... We propose a confidence interval that does not require equal variances or equal covariances. The results of a simulation study demonstrated that the proposed ... Feb 22, 1997 ... A useful coefficient for assessing internal consistency is Cronbach's alpha.2 The formula is: [This figure is not available.] where k is the number of items. This study has been undertaken with an objective of calculating and interpreting cronbach's alpha for evaluation of the internal consistency of items by using ... Oct 13, 2014 ... We propose a confidence interval that does not require equal variances or equal covariances. The results of a simulation study demonstrated that the proposed ... In these results, the overall Cronbach's alpha is 0.9550. The value is greater than the common benchmark of 0.7 and suggests that the items are measuring the ...