Which of the following is true of the evolution of the human brain?
a. The human brain is smaller than that of any other primate.
b. Comparisons of brain size within the primate family require an adjustment for body size.
c. The size of primate brains has shrunk over the course of evolutionary history.
d. Primate brain size increases depended on the elimination of duplicate master genes.
e. Inactivation of the ghrelin gene likely makes chimpanzee brains larger than human brains.
Answer: b. Comparisons of brain size within the primate family require an adjustment for body size.
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Indicate whether the statement is true or false.
One of psychology's founders, William James, believed that an infant's mental experience is
A) frustrating, as movement is limited. B) joyful, if parents are responsive. C) filled with confusion. D) impossible to measure.