According to the text, one reason that young children often fail to correctly solve conservation problems is that they do not see them as logical problems; rather they see them as:

Positive emission tomography (PET) scans have shown that certain cognitive therapies can

a. reduce brain activity related to fear. b. help form the union between mind and body. c. work, but only when drug therapy is also used. d. increase overall brain activity. e. increase the volume of some brain structures.

For most traits,

a. gender differences are quite large. b. the distributions of the traits for males and females do not overlap. c. gender differences are small for group averages, but are quite substantial for people at the ends of the distributions. d. gender differences occur for most traits.