by Steven A. Stahl
American Educator, Spring 2003, pp. 18-19.

We live in a sea of words. Most of these words are known to us, either as very familiar or at least as somewhat familiar. Ordinarily, when we encounter a word we don’t know, we skip it, especially if the word is not needed to make sense of what we are reading (Stahl, 1991). But we remember something about the words that we skip. This something could be where we saw it, something about the context where it appeared, or some other aspect. This information is in memory, but the memory is not strong enough to be accessible to our conscious mind. As we encounter a word repeatedly, more and more information accumulates about that word until we have a vague notion of what it “means.” As we get more information, we are able to define that word. In fact, McKeown, Beck, Omanson, and Pople (1985) found that while four encounters with a word did not reliably improve reading comprehension, 12 encounters did.

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