What determines the length of words? MIT researchers say they know.
Why are some words short and others long? For decades, a prominent theory has held that words used frequently are short in order to make language efficient: It would not be economical if “the” were as long as “phenomenology,” in this view. But now a team of MIT cognitive scientists has developed an alternative notion, on the basis of new research: A word’s length reflects the amount of information it contains.