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Classical Test Theory . By ____________________. What is CCT?. X = T + E. What is “true score”?. Assumptions of CTT. Item Analysis Using CTT p – value (difficulty index). Example How to calculate the difficulty index. d iscrimination i ndex.
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Classical Test Theory By ____________________
How do you improve a test by conducting the item analysis in CTT?
Procedures for estimating reliability • Test – retest reliability
Example • Reliability = .91 • SD = 10 • Then, SEM is ____________