Is repressed memory as common as Freud thought, and is Freud still important today? What mistakes do humans routinely make in judging how likely events are to occur? Why do we find patterns in events even when they are unrelated? How do genetics make some people more prone to drug addiction, sensation seeking, or being highly sociable? Just how do you teach old dogs new tricks, and how does this same mechanism end up causing superstitious behavior? How are sexual identity, sexual orientation, and sex roles developed, and what did we learn about that process from the case of the opposite sex...