ABSTRACT
One of the most dramatic manifestations of variability in human performance is that which occurs when the feedback that individuals receive of their own movement is displaced in some manner. Research studies on displaced feedback, dating back almost 16 decades, have been carried out in the context of a more general interest in psychological science regarding the nature of space and time integration of efferent and afferent neural mechanisms in the control of overt behavior. The term “displaced sensory feedback” thus refers to the introduction of either spatial transformations (spatially displaced feedback) or temporal delays (delayed feedback) in the relationships between motor (efferent) behavior and the sensory (afferent) feedback generated by that behavior. For conditions in which sensory feedback is distorted in some manner, but not spatially or temporally displaced, the term “perturbed sensory feedback” is applied.
