What evidence suggests that there is a genetic component to the etiology of ASD?
Answer:
The prevalence of ASD is much greater among siblings of a child with ASD. Researchers have also found higher concordance rates among MZ than among DZ twins. In the largest twin study to date, concordance rates were 60 percent for MZ twins and 0 percent for DZ twins. For a broader spectrum of disturbances, concordance rates were 92 percent for MZ pairs and 10 percent for DZ pairs. Other research has suggested that a combination of different genes, or even spontaneous genetic mutations, may be involved.
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What will be an ideal response?
If the experimenter had instead used an independent samples design with the same number of participants
a. the power of the design would have increased. b. the power of the design would have decreased. c. the power of the design would have stayed the same. d. the power of the design would not be predictably affected.