12 subjects judged the magnitude of the corridor illusion as two independent variables were manipulated, complexity of context and orientation of the target figures. The contexts included a complete corridor, one with vertical elements deleted, and one having but two converging lines. Figures embedded within these contexts were thin black lines oriented either vertically or horizontally. Although the context had a significant effect upon the magnitude of the illusion, orientation of the judged lines did not. These results suggest that it is legitimate to use the corridor illusion to illustrate size-distance relationships.
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