In a new book, “Virtually You: The Dangerous Powers of the E-Personality,” Stanford University psychiatrist Dr. Elias Aboujaoude argues that the time we spend on the Internet doesn’t just cause us to have online alter egos. It influences who we become and how we interact with others when we’re offline as well.

“I see my book as my attempt at dissecting this thing called an e-personality – the changes that happen in our personalities when we go online, the new traits that we take on,” he said. “What I see, more and more, we are starting to resemble our avatars.”