3.Choose an individual difference variable that you learned about in this course and that is
particularly interesting to you. Describe how genes and environment contribute to the stability of this variable over time. Be specific, and provide supportive examples.
4. Describe a specific aspect of development that interests you [e.g, development of speech,
development of friendships, development of understanding of gravity), and describe three
mechanisms of change that you believe may be involved. One mechanism of change should be biological, one should be behavioral, and one should be cognitive.