The purpose of this research is to examine the main points made by Vellutino, et al., in an article dealing with the perceptual-deficit hypothesis, which holds that learning disabilities are based on the sensory-motor deficiencies, or the inability of the subject to hear or see materials that are to be learned. The plan of the research will be to explain the criticisms that the authors have of trends in and standard theories and modes of remedial instruction, particularly in elementary and secondary education. Vellutino, et al. argue that treatment modes for learning-disabled students that focus on sensory-motor capabilities fails to take account of such students' capacities for grasping concepts or for the interrelationships between conceptualization on the part of the students and the development of such sensory-motor abilities as they may have: "Perception is not an entity, but an abstr