In his book, Foundations of Bilingual Education and Bilingualism, which has sold more than 60,000 copies he states: "Bilingualism is notadirect cause of speech or language impairment, autism, dyslexia, developmental aphasia
, severe subnormality in cognitive development, serious emotional disturbance or behavioural problems.
Various professional groups use the term differently, but the Individuals with Disabilities Education Act defines a learning disability as "a disorder in one or more of the basic psychological processes involved in understanding or in using language, spoken or written, that may manifest itself in imperfect ability to listen, think, speak, read, write, spell, or to do mathematical calculations, including conditions such as perceptual disabilities, brain injury, minimal brain dysfunction, dyslexia and developmental aphasia
[a severe language disorder].
More than we could provide at home" Kimberly Donovan, 22, who has mild mental retardation and developmental aphasia
, has been a residential student at the Cardinal Cushing School and Training Center, a program of St.