The objective of this supplement is to define disability outcomes research
and to describe the issues facing this new discipline. Drawing on the scien
tific, English-language literature, this group of articles reviews and comm
ents on the current methods and measures of disability outcomes research, w
ith an eye on providing insights into future directions for disability outc
omes research. The future includes expansion of the framework that defined
disability and evolution of the methods for the research itself.