…in part because there is no neural evidence supporting the top-down model This is remarkable, because the top-down model makes a clear neural prediction …
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Finally, we asked what the neural source of this enhancement effect might be Early visual cortex itself does not know anything about words or letters, so it has to come 'from the top-down' -- from some higher-order brain area But where?pic.twitter.com/bGmhjzraVq
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We expected that in a source area the neural activity covaries with the amount of letter information in early visual cortex, such that letter information is higher when the area is more active, and vice versa. & this relationship should hold within, not just between conditionspic.twitter.com/9NTZLrjzgt
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When we tested for such a hallmark, we found exactly this pattern of effects in VWFA, pMTG and IFG — all key areas of the reading network … suggesting these areas might be the source of the enhancementpic.twitter.com/lICIdMtgBd
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Altogether, these results provide neural support for the top-down nature of the word superiority effect. Which suggests that perhaps readers can better identify letters in words because they might, quite literally, see them better
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