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| CTT-package | Classical Test Theory Functions |
| CTT | Classical Test Theory Functions |
| CTTdata | Example Multiple-Choice Data |
| CTTkey | Example Multiple-Choice Key |
| disattenuated.cor | Function for disattentuated correlation |
| distractor.analysis | Function for item distractor analysis |
| reliability | Function for item reliability analysis |
| score | Function to score the response files |
| score.transform | Function for transforming scores onto different scales |
| spearman.brown | Functions for Spearman-Brown "Prophecy" Formula |
| subscales | Function to create subscales based on a design matrix |