Reverse correlation is an easy way to look into a person's brain without any fancy equipment. If you ask people to decide between images obscured by noise, the noise tells you a lot about how human vision works.
In the above picture, Gosselin & Schyns (2003) repeatedly presented people with white noise, telling them some images contained the letter "S" (though none did). When they averaged the noise fields that were thought to contain "S", the letter appeared. Moreover, the font of this "S" corresponded the operating system each person tended to use.
@sotolf Lol 😅, it's a slow process. Getting even a blurry image takes thousands of trials. Though I've been working on a method to improve the internal representations derived from noise.
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