Thesis (Ph.D.)--Boston University / Purpose: It was the purpose of this study to test hypotheses concerning the effects of amphetamine sulfate on certain areas of behavior and school performance of hyperactive children. The literature inciicated that some children were observed to be less active and less impulsive and to have greater emotional control and a longer attention span when given amphetamine sulfate. No diagnostic criteria had been established to determine with which children this medication was effective, although many observers felt that the predicted effect occurred with children suffering from an organic cerebral dysfunction. A preliminary study by this writer to investigate the hypothesis that the administration of amphetamine sulfate to children suffering from organic cerebral dysfunction produced more efficient behavior, produced inconclusive results. It suggested that hyperactivity was the factor which differentiated between those children who would show the predicted behavioral changes with amphetamine sulfate and those who would not. [TRUNCATED]