It is curious that the author chose to solicit advice from Joseph Devlin, someone who has never…
Barbara Liston

Thanks for reading so closely.

You’re right that the link Devlin cites is merely in the general category of “noninvasive brain stimulation,” and that that particular study used magnetic rather than electrical stimulation. But my queries to him were indeed about tACS and tDCS and the mechanisms by which they might work on the brain. His quote that I shortened with ellipses in the story was: “I am not aware of any solid evidence base that suggests that non-invasive brain stimulation such as transcranial alternating current stimulation (tACS) really improves cognition.”