Asymmetry In Object Substitution Masking Occurs Relative To The Direction Of Spatial Attention Shift

Objective:to a dispersion of the masker duration exceeds the target stimulus duration may reduce the target stimulus definition, this phenomenon is called substitution masking (abbreviation OSM), the traditional perceptual experiments usually adopts visual backward masking in the omentum level interference on target stimulus processing, mainly has the pattern masking and partial contrast masking in two forms.In recent years the object substitution masking (abbreviation OSM) experimental study showed that, around the target stimuli presented four point can also lead to a target stimulus visibility drops.OSM occurred in object representation level, it is worth studying the masking phenomenon, can also be used as a new research paradigm.Non symmetrical object substitution masking effect, refers to the target stimulus than at the center of the surrounding elicited stronger substitution masking effect.The assumptions of spatial attention focused on the target stimulus, peripheral and central masking stimulus is located on the target note is mentioned in the same path and in the opposite direction.The asymmetric shape and attention switching to alternative asymmetric substitution masking effect contribution.Methods:in this paper, in order to test this hypothesis, the native language is not English are tried in seven experiments, in the seven experiment, four experiments were conducted with the letters as experimental materials, masking stimulus appeared in target stimulation of the lateral and medial, asymmetric masking shape to be alone and with rectangular way expertly rendered, after in three experiments the experimental materials changed to digital materials, masking stimulus appeared in the target stimulus from the injection point near the location of the center of masking and the fixation point--from remote locations--edge masking, asymmetric masking shape was alone and rectangular way expertly rendered by.By using E-prime software programming, using SPSS17.0statistical analysis.Results:asymmetric object substitution masking occurs the same attention switching direction about the same whether or not the center and edge.The results show that along with the target consistent attention-conversion direction than the opposite direction produced stronger masking effect, and not because it is their mother tongue and whether the digital material changes.We believe that the cause of asymmetric object substitution masking effect mechanism, is determined to target the attentional momentum flow caused by.May be in the direct path, with a certain momentum of the masking stimulus can quickly attracted attention or take more attention, in which peripheral produce stronger inhibition zone, relative and it is opposite to the direction of the location of the masking stimulus.Then, in the suppression of strong area of target stimuli, this decline is likely to be prepared, which leads to the non symmetry object substitution masking effect.Although unlike symmetric substitution masking effect, asymmetric substitution masking effect is due to the target and masker stimulation with the angle between center and edge relation is generated, and not the result of spatial attention switching lead.In Experiment1, symmetrical object substitution masking and asymmetric substitution masking occurs, but in Experiment2did not occur, in Experiment5, when the experimental material into digital materials did not occur, with the Nobuyuki Hirose and Naoyuki Osaka (2010) in Experiment2get the same results, although subjects from English speaking countries, and experimental materials changed to digital materials.It is important in experiment three and Experiment four results in the separation of symmetry and non symmetry of the masking effect of masking effect, as in experiment six and experiment seven to digital as experimental materials the experiment was also isolated from the symmetry of the masking effect and asymmetric masking effect.