Abstract
The adjacency principle asserts that the dominant cues in the determination of the perceived position of an object in a configuration of objects are the distance cues which occur between it and adjacent,not displaced,objects. The purpose of the present study was to apply this principle to the perception of relative depth from size cues. for this purpose,a visual situation was produced in which the per- ceived depth position of a playin card would differ depen- ding upon the relative effedtiveness of the size cue between this card and other cards. In agreement with the adjacency principle it was found that the size cue between displaced dards in the determination of perceived relative depth