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    Different data of measurement

    Generally, you'd be putting data together into scales - usually items do not have mixed response types. You wouldn't try to get an overall Cronbach's alpha for your whole questionnaire, but for the subscales within.
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    Anonymous data within schools - how not to just use group mean over time - looking for references

    I'm doing behavioral research and would like to research methodologies of dealing with a set of data. I have anonymous surveys from school staff from 40 schools (between 10-150 staff answering surveys at each school) at 4 timepoints. Scales based on likert scale items. I have some information on...