Connected, but alone?

I found it interesting how Sherry Turkle used pictures and not only words to show us that people rely on their phones or devices too much. I also found it interesting how Sherry Turkle related the fact that when we use our devices to communicate it can cause troubles.

Who is Sherry Turkle and what is her profession?
How did Sherry Turkle get the idea about sharing the thought that most people are connected, but alone?