We've all found ourselves repeatedly making the same mistake, like playing the same wrong note in a piece of music, even though we know it's wrong. It's called perseveration - and it is particularly common among people with schizophrenia.rnNow Dara Manoach and her team at Harvard Medical School in Boston think they know why. They monitoredrnthe brain activity of people with schizophrenia while they performed an antisaccade task, which involves looking at a screen on which a green ring is flashed up, either on the left side or the right. Before the ring appears, one of two cues is flashed which tells participants how to react to the ring. Depending on the cue, they have to either look towards the ring, or look away.
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