Which brain imaging technique which gave a graphic representation of the electrical activity in the brain was the first to be developed?

What is the relationship between behavior and the well-documented increase in hormones during adolescence?

There is a modest or weak relationship between teenage hormones and behavior. Gonadal hormones lead to severe changes in moodiness and aggressiveness, especially in boys. Adrenal hormones make concentration difficult during adolescence. Gonadal hormones are probably responsible for a rise in drug abuse during adolescence.

According to the chapter I'm Warning You, what is a heuristic?

(a) quick rules we use to make decisions without spending too much time (b) thoughtful decision-making strategies (c) a prejudice (d) an analytical schema for understanding a new concept