Induction of a Stereoscopic Depth Effect

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Science  15 May 1964:
Vol. 144, Issue 3620, pp. 888
DOI: 10.1126/science.144.3620.888


Two pairs of horizontal lines of equal length, with different configurations of dots above and below, are presented stereoscopically. Upon fusion, the two lines are perceived as tilting in space in directions opposite to the depth effects of the dots.