Turkle is a credible source because she is a professor at MIT (Massachusetts Institute of Technology), which is heavily research-based. Additionally, she is the author of a book on technology/human engagement. So he would definitely be credible because he studied this topic and even wrote a book about it. The third paragraph begins with his statement: “For the past five years I have studied mobile connection technologies and talked to hundreds of people of all ages and circumstances about their connected lives.” Turkle is not some newbie who randomly decides to write about this topic, she has been studying this topic for quite some time and knows a lot about it, while having plenty of research to back up what she has