The evolutionary psychologist Robin Dunbar notes that by age 3 an average child can use about 1,000 words (double Kanzi’s bonobo world record); by age 6, around 13,000; and by age 18, some 60,000: ‘that means it has been learning an average of 10 new words a day since its first birthday, the equivalent of a new word every 90 minutes of its waking life.
FREE SPEECH: Ten Principles for a Connected World, [1] Timothy Garton Ash (2017)
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