Which of the following reasons best explains the increase in the prevalence of autism over
the past 40 years?
a. Earlier childhood development screenings and better understanding of the disorder
b. A major increase in the number of children with autism since the 1960s
c. Diagnostic criteria have become more specific in recent decades, causing an increase in
the diagnosis the disorder
d. a and b
e. b and c
A
Psychology
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The Sry gene on the Y sex chromosome triggers the synthesis of
A) testosterone. B) the Müllerian system. C) the primordial gonads. D) Sry protein. E) estradiol.
Psychology
The determination of causation is most easily accepted on the basis of
A) clinical trials. B) studies using the risk factor approach. C) community trials. D) experimental studies.
Psychology