# Jean Twenge Back to [[Reverse Flynn Effect and EdTech]] **Role:** Professor of Psychology, San Diego State University; hearing witness - At the hearing: "I research generational differences. I have been doing that for three decades." - **Prepared statement:** "The impact of smartphones, social media, and school laptops on youth mental health and academic performance." - She dates the academic turn to around **2012**. - She cites her own 2026 *Journal of Adolescence* (98:250–261) paper linking PISA declines to leisure device use at school. - **Books:** - *Generations* (2023; paperback 2025) - *10 Rules for Raising Kids in a High-Tech World* (2025, named in her testimony) - *iGen* (2017) ⚠️ (from memory) - On AI (committee release): "I'm even more concerned about the AI companion apps than I am about social media." - **Relevance:** Horvath said "as Jean said, of course, this is all correlative." The post's "post-2010" timing fits her data and his.