12/24/2010

Motion signals deflect relative positions of moving objects

The perceived relative position of a moving object is frequently shifted as compared to the relative position of the object in the real world.  The illusions have traditionally been explained by temporal models that influence the perceptual latency of visual objects.  However, another compelling theory has recently been proposed on the basis of spatial models that directly influence the coded location of visual objects.  In this study, spatial models were further supported by three different types of illusions composed of apparent motions, in which the perceived relative positions of stationary but apparently moving objects were shifted.  One of three illusions was developed as a novel type of illusion in this paper (kebab illusion).  The relative position shift of a stationary object suggested that spatial models play important roles on assignment of position of moving object as well as temporal models.  A mechanism (delta model) that integrated temporal and spatial models is also discussed.

Keywords: flash-lag effect; line motion; prediction; postdiction; kebab illusion;

Watanabe, E., Matsunaga, W., and Kitaoka, A., Motion signals deflect relative positions of moving objects, Vision Research 50, 2381-2390 (2010)

[PUBMED]

12/20/2010

Sight Line Illusion


Which point do the eyes look at?

The third point from the top? The 4th one?

When the sight line is defined as a line connecting the centers of white eye and black eye,  the eyes look at the top point (see below).


This optical illusion can be simplified as below.





See Akiyoshi's illusion page!
http://www.psy.ritsumei.ac.jp/~akitaoka/friends8e.html