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A Noncarpentered Environment People who live in urban, industrialized environments have a great deal of perceptual experience with straight lines, edges, and right angles. In contrast, people who live in a noncarpentered environment, like the village shown here, have little experience with right angles and perfectly straight lines (Phillips, 2011). Are people who grow up in a noncarpentered environment equally susceptible to the Müller-Lyer illusion?
David Poole/Robert Harding Picture Library Ltd/Alamy