Depth perception in peripheral vision M Arai |
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Doshisha University, Japan
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| Many studies have demonstrated that people can perceive depth in central vision, but they cannot perceive it in peripheral vision. We used two-dimensional and three-dimension-like images to examine whether depth perception is possible in peripheral vision. The participants were 21 university students. The experimental design involved 4 shapes (2 two-dimensional shapes [a circle and a hexagon] and 2 three-dimensional shapes [a sphere and a cube]) in 8 presentation positions (60°, 45°, 30°, and 15°; in the left and right directions, with the front as 0°). Participants were shown 32 images, in random order and asked to discriminate the two-dimensional and three-dimensional figures. The results showed that participants could significantly discriminate these images at angles ranging from 15° to 60° on both left and right sides, indicating that they could perceive depth in peripheral vision within these limits. The correct response rates were over 70% for almost all shapes and positions, except for the cube in the 60° position. These results show that the perceived shape of an object might be related to its depth perception in peripheral vision, since presentation positions with higher angles were associated with lower accuracy for identification of cubes and hexagons. |
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