Both sets of instruments are nationally standardized and normed and have demonstrated reliability and validity. The instruments use different scales. This will result in some discrepancies in the percentage of students who respond as satisfied or very satisfied, since the 7-point scale adds a somewhat satisfied and somewhat dissatisfied option for respondents. This may result in some slight differences in the results, although sample sizes are so large that results from both projects should accurately represent the populations of students that have been sampled. The institutions in the projects are not all the same.
Sample sizes are different.
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