For many years, therapists have assumed a relationship between impairment and disability. More recently, researchers have begun to examine this assumption. "Motor Function and Activities of Daily Living Assessments: A Study of Three Tests for Persons With Hemiplegia" by Filiatrault, Arsenault, Dutil, and Bourbonnais (AjOT, September 1991, pp. 806-810) is a laudable example of such an examinatio...