Which 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 2The results ofresearch on genetic and environmental factors involved in alcohol abuse find that ____.
a. genetic factors accounted for 56 percent of the risk of alcohol dependence
b. genetic factors accounted for 75 percent of the risk of alcohol abuse
c. genetic factors accounted for 45 percent of the risk of alcohol dependence while shared early environment made an 11 percent contribution to risk
d. genetic factors made no significant contribution to risk of alcohol dependence while early environment made accounted for 56 percent of the risk of alcohol dependence
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 DSM-5 diagnosis would be ____.
a. autism spectrum disorder c. intellectual disability
b. Asperger's syndrome d. learning disability
Question 4According to Walter (2001), progression from initial substance use to substance use disorderfollows a(n) ____ sequence.
a. typical c. haphazard
b. atypical d. heterogeneous
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