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

Cronbach's alpha estimates the internal consistency of responses in multi-item bipolar scales. This article examined three research questions (RQ): (1) To ... Jun 18, 2020 ... Researchers typically use Cronbach's Alpha when they want to know how much variance is item-specific and not shared by other items in the set. 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 ... Cronbach's Alpha, N of Items .554, 3. Two or more agree. Cronbach's Alpha, N of Items .668, 3. Trait 2 rater agreement. Frequency, Valid Percent, Cumulative ... Feb 3, 2023 ... We examined whether α values reported in the psychology literature are inflated at the rule-of-thumb thresholds (α = .70, .80, .90) due to, for example, ... Oct 14, 2015 ... We formulate a statistical model for parallel items to derive power functions as a function of C α under several study designs. Nov 16, 2015 ... Cronbach's alpha is not a measure of dimensionality, nor a test of unidimensionality. In fact, it's possible to produce a high α coefficient for ... Jun 27, 2024 ... Statistical Details for Cronbach's α. The statistic used in the Item Reliability option in the Multivariate red triangle menu is Cronbach's ... 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. Aug 29, 2022 ... Cronbach's alpha. Cronbach's alpha was first described in an article in 1951 (1) and has since been by far the most frequently used measure of ...