• Consider these descriptions of Jane and John. Keep in mind they are fraternal twins. Although their age is not given, from their activities they are teens in high school.
• Jane is very outgoing. She enjoys large gatherings of friends, participates in many extracurricular activities in school, and is a cheerleader and captain of her volleyball team. She loves to travel, meet new people, and experience different cultures.
• John is a quiet and studious young man. He loves to read and to listen to classical music. He has a small, intimate circle of friends who share the same interests. He is captain of his school's chess team, and his idea of the perfect sporting event is a chess competition. He is not interested in travel-unless he is going to a chess competition.

• Consider how both biological and behaviorist theories would explain the differences in Jane and John.

Questions:

• Compare and contrast biological and behaviorist theories by explaining the strengths and limitations of each theory.
• Apply the behaviorist theory in explaining the differences in the siblings Jane and John.
• Apply the biological theory in explaining the differences in the siblings Jane and John.
• Explain which approach is most effective for understanding the differences between Jane and John, and defend your reasoning.