Described are the history of the study of language disabilities, briefly outlining the work of Samuel Orton, Judson Herrick, Adolph Meyer, and Paul Schilder; Lauretta Bender's development of the Bender Visual Motor Gestalt Test; and the basic principles of language disorders, including familial patterns, maturation lag, plasticity, and nonfixated…

A group of perceptual and motor tests were administered to 155 advantaged and disadvantaged student. The results are discussed in terms of differential perceptual-motor and motor growth and need to structure educational experience that will contribute to growth. (Author)