The "surprising results" are a bit factoid-ey and if taken at face value are far more shocking than they turned out to be (I very much appreciate the references so I could check this):
"You can reverse up to 10 years of age-related cognitive decline simply by blocking mobile data on your phone for 2 weeks": the linked study says that it's attention span that is improved equivalent to being 10 years younger, as measured immediately after the study ends (only)
"Using ChatGPT on cognitive tasks can reduce your brain connectivity by up to 50%": this is measured using an EEG, so is measuring involvement of multiple brain regions while doing a task. Basically your brain doesn't have to work as hard at the task if you're using an LLM. It's not, you know, your connectome atrophying.
"You can reverse up to 10 years of age-related cognitive decline simply by blocking mobile data on your phone for 2 weeks": the linked study says that it's attention span that is improved equivalent to being 10 years younger, as measured immediately after the study ends (only)
"Using ChatGPT on cognitive tasks can reduce your brain connectivity by up to 50%": this is measured using an EEG, so is measuring involvement of multiple brain regions while doing a task. Basically your brain doesn't have to work as hard at the task if you're using an LLM. It's not, you know, your connectome atrophying.