Abstract
When one pair of dots is located in an object, the perceived space between those two dots is larger than the space of two dots which have same interval and are placed out of object. This is space distortion. Two experiments were performed to investigate the effect of binocular disparities on space distortion. The depth plane of surrounding object (in experiment 1) and of two pairs of dots (in experiment 2) was manipulated. The results showed that when objects or dots were perceived on a different depth plane from an original depth plane, the strength of space distortion was reduced. These results imply that space distortion is more related to early visual processing than attention.