Do you known any adults with a fear of the dark?
Fear of the dark
Fear of the dark is a common fear or phobia among children and, to a varying degree, adults. A fear of the dark does not always concern darkness itself; it can also be a fear of possible or imagined dangers concealed by darkness. Some degree of fear of the dark is natural, especially as a phase of child development. Most observers report that fear of the dark seldom appears before the age of 2 years. When fear of the dark reaches a degree that is severe enough
of the sentiments, thoughts, and attitudes of the parents toward the child. Autistic children show an extreme socializing disorder and do not want any sort of relationship with people. They "eliminate" people from their consciousness. For Arieti the fear of the parents is extended to other adults: a tendency to cut off communication with human beings.
Persistence of the theory.
According to Peter Breggin's 1991 book "Toxic Psychiatry", the psychogenic theory of autism was abandoned because of political pressure from parents' organizations,