What is redundancy in test items? How can redundant items affect Cronbach's alpha and the validity of a scale?

Calculate Cronbach's alpha ... The Cronbach's alpha thus increases when the number of items is increased and when the inter-item correlation increases. The ... 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 ... Dec 28, 2017 ... : Ideal Response Time and Delusion of Cronbach's Alpha. Journal of Measurement and Evaluation in Education and Psychology, 8(4), 344-353 ... This paper aims to guide assessment developers in paediatric occupational therapy, as well as practitioners who are evaluating outcome measures. Apr 16, 2020 ... The first Cronbach's alpha employs the covariances among the items, whereas the alpha based on standardized items employs the correlations among items. Sep 11, 2010 ... Cronbachs Alpha (CA) tends to be underestimated in a PLS model. Therefore you should rely more on the AVE and composite reliability values. Apr 21, 2015 ... Item Analysis tells you how well a set of questions (or items) measures one characteristic (or construct) and helps to identify questions that are problematic. Feb 12, 2014 ... This tool computes Cronbach Alpha for a Datashop dataset. Based on item-elimination Cronbach Alpha values, it ranks item reliability with in ... Dec 4, 2010 ... This application performs a basic Cronbach's alpha analysis on data provided by the user. The data may be supplied as numerical scores or ... Apr 16, 2023 ... First, it assumes that the items are unidimensional, meaning that they measure only one construct or factor. However, this may not always be the ...