![]() It looked as if the typists had resisted the illusion. So regardless of what the typists saw, the feedback from their fingers told them that they had slipped up and they acted accordingly. This drop in speed also happened when they made a mistake that was surreptitiously corrected, but not when a false mistake was inserted. When the volunteers made a genuine error, they slowed down afterwards. On other trials, they deliberately introduced mistakes, which the typists hadn’t actually made. Sometimes, they put up the correct word, regardless of what the recruits actually typed so that their mistakes never appeared. Throughout the experiment, Logan and Crump occasionally took control to the display. ![]() Their efforts appeared below the target word, but all was not as it seemed. Logan and Crump asked 22 good typists to type 600 words presented on a screen, one at a time. One is based on the characters that appear on the screen, and the other depends on the strokes of our fingers, as they tap away at the keys. Using some clever digital trickery, the duo from Vanderbilt University found that the brain has two different ways of detecting typos. Spotting mistakes is a crucial part of typing (and indeed, life) and according to Gordon Logan and Matthew Crump, it’s a more complicated business than it might first appear. And all the while, I’m looking for errors. It is accessing my knowledge of language, processing the information taken in through my eyes and fingers, and coordinating the movements of my fingers. ![]() ![]() As my fingers flit over the keyboard, my brain is hard at work. ![]()
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