How is Rett's disorder different from childhood disintegrative disorder?
a. The deterioration that characterizes Rett's disorder often begins earlier in childhood than
the deterioration that is characteristic of childhood disintegrative disorder.
b. Rett's disorder is most commonly diagnosed in males, whereas childhood disintegrative
disorder is most frequently diagnosed in females.
c. Childhood disintegrative disorder is marked by severe motor disturbances whereas Rett's
disorder usually is not.
d. Children with Rett's disorder usually resemble children with autism, whereas children
with childhood disintegrative disorder usually do not.
e. Mental retardation is much more common in childhood disintegrative disorder than in
Rett's disorder.
A
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