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University of Michigan Medical School Associate Professor of Pediatrics Jenny Radesky testifies at a Senate Commerce Committee hearing on the impact of screentime and technology on youth that her research lab tracked lots of kids' devices finding easy access to inappropriate content where preschoolers, tweens, and teens use apps with mature ratings flagged for violence or gambling, manipulative designs where ninety-nine percent of studied apps had at least one design attempting to engage kids longer or monetize their time through ads or purchase pressure from trusted characters contributing to compulsive use and difficulty transitioning away from devices, collection and sharing of private identifiers in a 2020 study sending data to marketing databases which kids cannot understand or consent to, and designs like frequent notifications or social media algorithmic feeds invading important youth development spaces like school, sleep, or family conversations, with these same engagement-based designs applied to AI chatbots carrying further risks of relationship development and dependence.