Older brains do not think as quickly as younger brains do. But does this cognitive impairment arise because processing speeds slacken or because the ability to block out irrelevant information falters? A recent study reconciles these two leading hypotheses: older brains have a harder time ignoring distractions in the initial stages of performing a task, which slows down processing.
Brains More Distracted, Not Slower with Age: Scientific American
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Source: Scientific American
