Jean M. Twenge holds an unusual place among Ph.D. psychologists. For the past two decades, she has toggled between the obscurity of the academy and the glare of academic fame. The author of two college textbooks and five books for non-academic readers, she is equally at home researching and writing about adolescent mental health, sleep disorders, digital technology, homework, and narcissism. She was one of the first experts to warn nearly a decade ago that smartphones could hold negative consequences for our mental health.
