Infants on the edge: Beyond the visual cliff

Eleanor Gibson told her students several stories about the origins of the visual cliff paradigm (also described in Gibson, 1991, 2002). In one rendition, Gibson first began thinking about infants at the edge of a cliff during a family road trip to the Grand Canyon in the mid-1940s. She worried about her two young children playing near the rim, although her husband, perception psychologist James Gibson, assured her that they were sensitive to the...