| A) | In 1991, found that an area of the hypothalamus is twice as large in heterosexual males as in gay males
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| B) | Identified five key features that emerge in adulthood.
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| C) | Surveyed American sexual patterns in 1994
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| D) | Believed that an adolescent and an adult think qualitatively in the same way
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| E) | Described homosexuals as experiencing life as a minority in a majority culture
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| F) | Described the experience of "flow": an intense state of pleasure when engaged in absorbing challenges
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| G) | View of the world evolves from dualistic to relativistic
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| H) | Studied competency in adulthood.
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| I) | Argued that the level of education that emerging adults receive especially influences how likely they will maximize their cognitive potential.
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| J) | Studied alcohol and drug use in early adulthood.
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