If consumer EEG is so noisy, how much can it reveal about its user? · Grey Matter

Enough to matter, because noise is beaten by repetition.

If consumer EEG is so noisy, how much can it reveal about its user?

Enough to matter, because noise is beaten by repetition. In a 2012 study, software connected to a cheap EEG headset flashed images of banks, digits and places and read the brain's recognition response to each, narrowing down which bank a user had, digits of a PIN and where they lived better than chance. A single noisy trial says little, but many trials averaged by an app that runs for hours say more, which is why privacy advocates treat even low-quality consumer recordings as sensitive neural data.