“This process revealed some surprising findings. The introverts and extroverts participated about equally, giving the lie to the idea that introverts always talk less. But the introvert pairs tended to focus on one or two serious subjects of conversation, while the extrovert pairs chose lighter-hearted and wider-ranging topics. Often the introverts discussed problems or conflicts in their lives: school, work, friendships, and so on. Perhaps because of this fondness for “problem talk,” they tended to adopt the role of adviser, taking turns counseling each other on the problem at hand. The extroverts, by contrast, were more likely to offer casual information about themselves that established commonality with the other person: You have a new dog? That’s great. A friend of mine has an amazing tank of saltwater fish!”