Original citation: SE Palmer, T Ghose (2008). Extremal edges: a powerful cue to depth perception and figure-ground organization. Psychological Science, 19.1: 77-84. Target of replication: Extremal edges (EE) occur when our line of sight runs parallel to some portion of a smooth convex surface. They are thought to be an essential aspect of scene analysis and a strong cue to figure-ground organizati...