Evidence from the last 20 years of work in cognitive psychology indicates that we use the letters within a word to recognize a word. Many typographers and other text enthusiasts I’ve met insist that words are recognized by the outline made around the word shape. Some have used the term bouma as a synonym for word shape, though I was unfamiliar with the term. The term bouma appears in Paul Saenger’s 1997 book Space Between Words: The Origins of Silent Reading. There I learned to my chagrin that we recognize words from their word shape and that “Modern psychologists call this image the ‘Bouma shape.’”
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