To overcome the limitations of aphasia tests employed in the past, this study attempted to develop a scoring method which would consider the five dimensions of response and would sensitively quantify levels of behavior in a clinically practical manner. A multidimensional binary-choice scoring system was designed to quantify 16 levels of response involving varying degrees of accuracy, responsiveness, completeness, promptness, and efficiency. After 40 hours of training in the use of the method, three scorers scored each of 30 patients representing a heterogeneous sample of aphasic patients. The multidimensional scoring method was found to be clinically satisfactory in that it yielded high interscorer reliability as well as quantified descriptions of behavior.