Dr. Laura Kastner is a clinical psychologist and researcher. She studies psychology that focuses on mental and behavioral disorders. Dr. Kastner has done enormous amounts of work on child development. She currently runs her own website which includes, her biography, her works (books), articles and even her lectures. This is a very interactive website which includes teaching videos. Her role in Screenagers is to give parents an idea of how kids learn and grown. She studies the growth of a young child so she is very knowledgeable when it comes to how children act. Her books have become quite popular as well as her TedTalk https://www.youtube.com/watch?time_continue=42&v=sQa5d6PvtTk and other teaching videos she has on her website. She brings alot to the table when talking about Screenagers. She has knowledge on children and how they mature which makes her very usefull.