Difficulties in motor behavior are commonly associated with a variety of disabilities. Early research efforts focused on descriptions of specific groups of people or on evaluations of intervention programs. Only recently have investigators begun to explore questions from a variety of theoretical positions in an attempt to build a more fundamental understanding of the disabled person. The present volume represents views of major methodological issues, current research fronts and selected applied concerns from the perspective of the disabled performer. Authors write from a number of theoretical viewpoints and sketch future research directions in these chapters.