Test-Retest Reliability, SEM & Reliable Change
This lesson is part of the course
In this lesson
You correlate two DWS-6 sittings four weeks apart, turn the reliability into a standard error of measurement, put a 95% band around a score and find who changed by more than measurement error.
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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