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Why TikTok Keeps You Scrolling: Baylor Research Explains the Science Behind Social Media Addiction
Why is it so hard to stop scrolling TikTok? A new study by Baylor University marketing professors and social media researchers James A. Roberts, Ph.D. and Meredith E. David, Ph.D., reveals that the answer lies not only in the app’s content, but in its design. Their research, published in the journal Cyberpsychology, Behavior, and Social Networking, is among the first to compare the technological affordances – the built-in design features that shape user behavior – of three leading short-form video (SFV) platforms: TikTok, Instagram Reels and YouTube Shorts. The findings reveal that TikTok’s combination of ease of use, highly accurate recommendations and surprising content variety creates a powerful recipe for user engagement – and, in many cases, addiction. The power of effortless design In their study, Roberts and David had participants rate each platform on three key technological affordances: perceived effortlessness, recommendation accuracy and serendipity (the element of surprise) and answer questions measuring their levels of social media engagement and addictive use. The results were clear: TikTok scored significantly higher than Instagram Reels or YouTube Shorts across all categories. Users in the study said TikTok required the least effort to use, delivered the most relevant videos and surprised them most often with unexpected but enjoyable content. “It’s the combination of all three that keeps people scrolling,” David said. “But the prerequisite is effortlessness. Without that ease of use, the other two wouldn’t matter as much.” TikTok’s seamless experience – where videos begin playing automatically the moment the app opens – creates a sense of immersion unmatched by competitors. Other platforms require users to click or select a video before viewing begins, a subtle difference that nonetheless makes TikTok feel faster and more intuitive. Engagement becomes addiction The study found that TikTok’s technological affordances indirectly increase addiction by first increasing engagement. The more users engage, the more likely they are to lose track of time – a phenomenon known as time distortion. David said this design is no accident. “TikTok’s algorithm is intentionally created to be addictive,” she said. “Their own materials acknowledge that users can become hooked after less than half an hour on the app.” She noted that even users who recognize these patterns often underestimate how long they spend scrolling. “We all need to be more cognizant of our time on these platforms,” David said. “Check your phone’s screen-time data – you may be surprised.” Implications for users and policy Beyond individual awareness, the researchers point to the broader social impact of overuse – particularly for young people. Excessive time on short-form video apps can erode attention spans, foster expectations for instant gratification and displace face-to-face interaction. “These platforms are designed to hold our attention,” David said. “But the opportunity cost is huge. The more time we spend scrolling, the less time we have for the activities that build real connection and meaning.”
