Why Smart People Are Starting to Think Less (The MIT ChatGPT Study)

In 2025, MIT researchers had people write an essay with help from ChatGPT. Minutes later, 15 out of 18 couldn't quote a single sentence from their own essay. Here's what that study and the earlier Google research really show, where the evidence is still shaky, and a 2-minute habit that keeps your own brain in the game. Chapters 0:00 The essay nobody could quote 0:36 Google and your memory, 2011 1:23 Transactive memory 1:43 The part the headlines skipped 2:25 Cognitive offloading isn't laziness 3:04 Handing off the thinking 3:40 Inside the MIT study 4:37 The honest fine print 5:11 The 4th-session swap 5:46 Think first, then ask Sources (including the replications that pushed back) Sparrow, Liu & Wegner, 2011, "Google effects on memory: Cognitive consequences of having information at our fingertips", Science: https://doi.org/10.1126/science.1207745 Camerer et al., 2018, "Evaluating the replicability of social science experiments in Nature and Science between 2010 and 2015", Nature Human Behaviour: https://doi.org/10.1038/s41562-018-03... Hesselmann, 2020, "No conclusive evidence that difficult general knowledge questions cause a 'Google Stroop effect'. A replication study", PeerJ: https://doi.org/10.7717/peerj.10325 Schooler & Storm, 2021, "Saved information is remembered less well than deleted information, if the saving process is perceived as reliable", Memory: https://doi.org/10.1080/09658211.2021... Storm & Stone, 2015, "Saving-enhanced memory: The benefits of saving on the learning and remembering of new information", Psychological Science: https://doi.org/10.1177/0956797614559285 Risko & Gilbert, 2016, "Cognitive offloading", Trends in Cognitive Sciences: https://discovery.ucl.ac.uk/1508770/ Kosmyna et al., 2025, "Your Brain on ChatGPT: Accumulation of Cognitive Debt when Using an AI Assistant for Essay Writing Task", arXiv preprint, not peer reviewed: https://arxiv.org/abs/2506.08872 MIT Media Lab, 2025, "Your Brain on ChatGPT" project page and FAQ: https://www.media.mit.edu/projects/yo... McGill Office for Science and Society, "Digital amnesia has been exaggerated": https://www.mcgill.ca/oss/article/cri... Jones, 2025, "Does using ChatGPT change your brain activity? Study sparks debate", Nature, republished by Scientific American: https://www.scientificamerican.com/ar... Doodle Psych is for education and curiosity, not professional advice. #psychology #chatgpt #memory