Why Do They Act That Way? A Survival Guide to the Adolescent Brain for You and Your Teen, by David Walsh, YEAR. Popular Twin Cities area psychologist and lecturer, David Walsh considers the current state of research into the adolescent brain and has developed guidelines for parents and others who deal with teens on a daily basis. Walsh offers parents self-exam questions designed to help them develop a parenting style that is compatible with the changes the teen child is experiencing. He advocates relaxing direct attempts to control behavior in exchange for maintaining connection and communication. “Adolescence is not a problem to be solved. It is an experience to be lived,” he concludes.