Distinguished University Professor, Temple University; Author, The Ten Basic Principles of Good Parenting (2017), Adolescence (2016, 11th Edition), Age of Opportunity: Lessons from the New Science of Adolescence (2014), and You and Your Adolescent: The Essential Guide for Ages 10-25 (2011, Revised Edition); Co-Author, "Around the World, Adolescence is a Time of Heightened Sensation Seeksing and Immature Self-Regulation" (2018, Developmental Science), "Adolscents in Peer Groups Make More Prudent Decisions When a Slightly Older Adult is Present" (2016, Psychological Science), and "Peers Increase Late Adolescents' Exploratory Behavior and Sensitivity to Positive and Negative Feedback" (2016, Journal of Research on Adolescence)