The core features of Damp Syndrome are deficits in attention, motor control and perception. DAMP and Asperger Syndrome are similar and can occur together. DAMP can also cause significant speech and language difficulties e.g. articulation problems and certain variants of stuttering. Heredity appears to play a much lesser role in DAMP than in Asperger Syndrome. It would appear that criminality is more common in persons with DAMP than in those with Asperger Syndrome.