Cronbach%27s alpha_ explained

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internal consistency reliability (coefficient alpha) Computing Reliability. Both test-retest and interrater reliability are indexed with a product-moment correlation. The data file should have the two scores on the same line for each subject as shown in this screen. This file shows the scores for 12 subjects taken two weeks apart to estimate ...

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Phương pháp Cronbach Alpha dùng để đánh giá độ tin cậy của thang đo. Còn phương pháp phân tích nhân tố khám phá EFA (Exploratory Factor Analysis, gọi tắt là phương pháp EFA) giúp chúng ta đánh giá hai loại giá trị quan trọng của thang đo là giá trị hội tụ và giá trị phân biệt. Cronbach's Alpha Satisfaction (α=.84 - Mexico) (α=.70 - Spain) Cronbach's Alpha Empowerment/independence (α=.84 - Mexico) (α=.69 - Spain) Cronbach's Alpha Social belonging/community integration (α=.71 - mexico) (α=.62 - Spain) Validity: Construct (Convergent and Discriminant)

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The percentages of explained variance were very high in all samples, with the lowest percentage (91%) in the IS-ICH sample. A sensitivity analysis showed that an SS-QoL-12 version with the two other items would have resulted in nearly identical Cronbach's alpha and explained variance figures (maximum 0.01 point or 1% lower). Assume that a researcher is interested in developing a measure that can be used with adolescents to estimate their levels of stress due to exposure to traumatic events. Her interest is in using the measure to determine if therapy helps to alleviate stress associated with the experience of traumatic events. Also assume she creates a … Continue reading "Cronbach’s alpha/Test Re-test ...

PCA reduces the dimensionality of the data set, allowing most of the variability to be explained using fewer variables. PCA is commonly used as one step in a series of analyses. You can use PCA to reduce the number of variables and avoid multicollinearity, or when you have too many predictors relative to the number of observations.