title: Improving the responsiveness of rating scales: the challenge of stepping twice into the same river.
authors.forename: Merit E
authors.initials: ME
authors.lastname: Cudkowicz
authors.forename: David
authors.initials: D
authors.lastname: Schoenfeld
authors.forename: Linda
authors.initials: L
authors.lastname: Williams
mesh_terms: D015331:Cohort Studies; D005188:False Negative Reactions; D006801:Humans; D009422:Nervous System Diseases / Q000523:psychology / Q000534:rehabilitation; D009483:Neuropsychological Tests; D017063:Outcome Assessment, Health Care / Q000379:methods / Q000592:standards*; D012015:Reference Standards; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013997:Time Factors; D016896:Treatment Outcome