Warning: my brain implant demo kept thinking my blink was a 'yes'

Last Saturday I demoed a consumer EEG headset at a friend's place in Portland, and the calibration software kept asking yes/no questions to map my neural states. Every time I blinked, it logged a strong 'yes' response, so I ended up confirming like 14 questions I barely read, including one about whether I wanted to order a pizza. My buddy was laughing because the display showed my 'enthusiastic consent' for extra pineapple, which I absolutely did not give. It got me thinking how many of these systems confuse eye artifacts with real intent, especially for people with tics or who blink a lot. Has anyone else caught their BCI misfiring on something as basic as a blink, or is it just my twitchy eyes?

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ryan7192mo ago

Blink suppression is the trick that worked for me when messing with an EEG setup at a maker fair. The software had a filter setting for eye movement, but I had to manually adjust the threshold until it stopped reading my blinks as commands. Even then, I kept my eyes super wide and tried to stare at a fixed point, because any little flutter set it off. Made me realize those demos are more about showing off than actually being reliable for real use. If the calibration has a "hold still" mode or lets you set a custom blink sensitivity, use that. Otherwise, just assume every menu click is a lie.

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