During what substage does the infant's behavior, for the first time, occur not as accidents but as intentional, goal-directed behavior?
a. substage 1: simple reflexes
b. substage 2: first habits and primary circular reactions
c. substage 3: secondary circular reactions
d. substage 4: coordination of secondary schemes
D
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An epidemiologist is about to testify to Congress on the findings of comorbidity. Which of the following points will she want to make after reviewing research on comorbidity?
a. Most mental disorders have a biological basis. b. Those with severe impairment often have more than one disorder. c. We have underestimated the role of toxins as the cause of disorders. d. The majority of mental disorders tend to "run in families" as a result of genetic anomalies.
__________ are located on the __________
a. Nucleotides; chromosomes b. Chromosomes; genes c. Genes; strands of DNA d. Chromosomes; nuclei of cells e. Genes; chromosomes