“…Research has clearly indicated that misleading size cues can alter the apparent depth orientation of an object in spite of the presence of veridical cues of binocular disparity (Ames, 1951;Gogel, 1954;Gogel, 1956;Gogel & Harker, 1955;Ittelson, 1952Ittelson, , 1960Zegers & Malone, 1964;Zegers & Murray, 1962). For example, if an Ames trapezoidal window (Ames, 1951) is oriented with its smaller end closer to 0, it will usually appear as though this end were the more distant.…”