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| CTTsub | This main function computes subscores using different methods in classical test theory (CTT) |
| CTTsub.RegOnSub | This function computes subscores based on the observed subscore in classical test theory (CTT). |
| CTTsub.RegOnTot | This function Computes subscores based on the observed total score in classical test theory (CTT) |
| CTTsub.RegOnTotSub | This function Computes subscores based on both the observed subscore and the observed total in classical test theory (CTT) score |
| data.prep | This function prepares the data that can be used by other functions |
| scored.data | Sample scored data |
| test.data | A list of objects that include both test information and subscores. |