Approximately what percent of women report that they fear sexual intercourse during pregnancy?

That infants initially babble the same speech sounds across the world indicates that learning and the environment influence language development more strongly than the biological basis for language.

a. true b. false

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.