Looking at the concordance rates for autism found in twin studies and family studies, Newschaffer and colleagues (2007) believe that autism is primarily the result of ____.
a. genetic factors
b. genetic and environmental factors
c. environmental factors
d. sociocultural factors
Question 2Which statement concerning the etiology of autism is correct?
a. The most common etiological basis of autism noted so far is parental neglect or detachment.
b. The early lack of normal development suggests biological rather than psychosocial factors.
c. Researchers believe that there is one cause for autism that has yet to be discovered.
d. Although psychological effects are important, biological factors play the most critical role.
Question 3Bobbie Jo appeared to develop normally for the first year of her life, but then she began to exhibit severe isolation and communication difficulties as well as repetitive behaviors. Her head size, however, was normal. The most likely diagnosis would be ____.
a. autism spectrum disorder
b. Asperger's syndrome
c. intellectual disability
d. learning disability
Question 4Candy is a two-year-old with a moderate intellectual disability. She appears to have a single crease across the palm of her hand, slanted eyes, and a harsh voice. What diagnosis would Candy most likely be given?
a. Down syndrome
b. autism spectrum disorder
c. fragile X syndrome
d. learning disability
Question 5Nicole interacted with her parents in a normal manner until she was one year old. Then, at one, she stopped abruptly and became increasingly alone and bizarre. There was no medical reason for this change. What is an appropriate diagnosis for Nicole?
a. separation anxiety disorder
b. autism spectrum disorder
c. Tourette's syndrome
d. pediatric bipolar disorder
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