At the political convention, the people are crowded together on the convention floor. Although the large group is a mixture of different gender, ages, and races with many different outfits, you easily group these people together based on the sign being held up in the middle of each group that bears their state's name. Your grouping was the result of which perceptual principle?

When a cognitive function relies on one cerebral hemisphere more than the other, this phenomenon is known as

A) long-term potentiation. B) lateralization. C) self-awareness. D) right-brained or left-brained people.

According to surveys in which teens report their increasingly intimate sexual activities,

A) boys and girls follow the same sequence of activities at about the same age. B) girls report the same sequence of activities as boys, but a year later. C) girls, who reach puberty earlier than boys, become involved in sexual activity earlier too. D) the sequence of sexual activities is shorter for boys, who skip over some of the steps that girls report.