To give a typical example, Professor Lightner Witmer, Director of the Psychological Clinic of the University of Pennsylvania, was once consulted about an eleven-year-old boy, of good family, who had been pronounced by several New York specialists “mentally defective” and “certain to prove unmanageable.” His father reported that he was unable to do correctly simple sums in addition and subtraction, and could not read a simple sentence without making a number of mistakes; also that he was cowardly, bad-tempered, and quarrelsome. In fine, the statements made concerning him seemed to stamp him as a fit subject for institutional care. But Professor Witmer’s preliminary testing caused him to take a somewhat hopeful view of the poor youngster’s condition. “He was,” Professor Witmer says, in an interesting report he has made regarding the case (_The Psychological Clinic_, vol. ii, pp. 153-179), “a stocky, well-built, healthy-looking child. He had red hair, and the expression of his face suggested an unsteady temper. The brow was low, but not of a character to awaken a suspicion of mental deficiency. The shape of the aperture of the eyes indicated a possible arrest of fœtal development, but this was the only suspicious symptom. The teeth were in good condition, the mouth closed, the nose undeveloped, the nostrils small. A hasty examination showed the necessity of consulting an oculist, and the appearance of the nose and nostrils called for an examination of the naso-pharynx. The chest was fairly well developed, the voice was good, but he had a lisp, and his speech was a trifle thick. Hearing was normal. His manners at table were good. His gait was normal, the knee-jerks were present on both sides, the coordination of the hands was good. “In his conversation with me and with his family, he seemed to me to be a normal boy of eleven, rather alert mentally, a self-contained, independent sort of boy. If I had visited the family casually, I would not have observed anything wrong with him. My first brief examination was therefore negative, and excepting for the history which the father and mother gave, I should have pronounced the boy normal, but probably suffering from some optical defect and from naso-pharyngeal obstruction.”