ABSTRACT
CoMMUNICATI9N disorders constitute a major problem area for the mentally retarded. Speech, hearing, and language deficits have been identified in over 25 investigations as occurring markedly more frequently among mental retardates than among normal persons (Batza, 1956; Bradley, Evans, and Worthington, 1955; Brandfon, 1951; Carlton and Carlton, 1945a; Foale and Paterson, 1954; Goertzen, 1957; Hardy, 1948; Johnson, Copobianco, and Miller, 1960; Kennedy, 1930; Kodman, Powers, Phillip, and Weller, 1958; Lewald, 1932; Lubman, 1955; Mecham, 1955; Rigrodsky, Prunt, and Glousky, 1961; Rittmanic, 1959; Sachs, 1955; Schlanger, 1953a, 1953b, 1954; Schlanger and Gottsleben, 1956, 1957; Siegenthaler and Krzywicki, 1959; Sirkin and Lyons, 1941; Tarjan, Dingman, and Miller, 1960; Webb, Kinde, Weber, and Beedie, 1964) . Despite the prevalence of these problems direct professional attention has not been broadly available.
