Cronbach's Alpha by Hand: Item Variances vs Total Variance
This lesson is part of the course
In this lesson
You calculate Cronbach's alpha for the DWS-6 step by step, from the six item variances and the variance of the total, and predict alpha for a longer scale.
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Lessons in this course
- Reverse-Scoring Negatively Worded Items Locked
- Scale Totals, Means & the Missing-Item Rule Locked
- Standardised Scores: z-Scores and T-Scores Locked
- Cronbach's Alpha by Hand: Item Variances vs Total Variance Locked
- Item-Total Correlations: Which Items Belong? Locked
- Alpha if Item Deleted: Shortening the Scale Locked
- Test-Retest Reliability, SEM & Reliable Change Locked
- Norm Tables, Percentile Ranks & Normalised T-Scores Locked