Folstein and Rutter studied sets of identical twins in which only one child was autistic. What did they find to be associated with autism of the affected child?

Question

Quizplus · Accepted Answer

Folstein and Rutter found that brain injury at or just after birth was associated with autism of the affected child. This suggests that environmental factors early in life may play a role in the development of autism. The other options listed (inheritance of a recessive trait, immunological rejection in utero, infection that passed the placenta) have not been established as reliable causes of autism.

Folstein and Rutter Studied Sets of Identical Twins in Which