Publications
Publication details [#7168]
O'Connor, Neil. 1975. Cognitive processes and language ability in the severely retarded. In Lenneberg, Eric H. and Elizabeth Lenneberg, eds. Foundations of language development: A multidisciplinary approach. Academic Press. pp. 311–322. 
Annotation
Subnormal language, though it may reflect the logic of identity and relationship, is said to be not only undeveloped (slowed, arrested) but also to show a form of inertia, inhibiting its use as a coding medium.