Subsequently, five further families have been identified, some of which also include individuals with X-linked mental retardation without infantile spasms 48-52.
Then McBride said his research showed that Debendox was also responsible for causing mental retardation.
At the same time the employers and fellow employees become sensitized to individuals with mild to moderate mental retardation.
Other research areas include dyslexia and dynamic assessment in persons with severe mental retardation.
For pupils with mental retardation there are nearly no changes.