Abstract
How are serially presented visual stimuli {S_1, S_2,…} sometimes unified into a single event and at other times separated to arouse apparent motion? We call this problem "bifurcation"; to investigate how the problem is solved by the visual system, we introduced apparent motion of rigidly structured 3-dimensional object; stimulus was based upon multiple frames constructed by a frame-splitting method rather than 2-frame paradigm. It was concluded through two experiments that the visual system is equipped with an underlying computing mechanism and two memory systems; the memory systems are distinguished from each other in their functional roles and their temporal limits of persistence.
