| achievable_totals | Achievable total scores of an instrument |
| classify_severity | Classify total scores into severity bands |
| get_instrument | Retrieve an instrument definition by id |
| list_instruments | List registered instruments |
| mid_estimates | Published anchor-based change statistics ("MID estimates") |
| missing_rule_none | Declare that no published missing-item rule exists for an instrument |
| missing_rule_prorate | Declare a published prorated-scoring rule for missing items |
| register_instrument | Register an instrument definition |
| responder | Classify responders by an explicitly chosen change threshold |
| score_instrument | Score an instrument from a data frame of item responses |
| score_ipss | Score the International Prostate Symptom Score (IPSS) |
| uro_instrument | Define a scoring instrument |