Gestal In Attention-blink Phenomenon

Attention is a vital condition not only for individual information processing and various cognitive activity,but also for completion all sorts of behaviors.Only being attention,people can supervise their own movement and behavior to avoid making mistakes and finish the corresponding task to achieve their aims.The research on attention before is more focused on attention deployed over space;the most update trend is Attention Blink, which is more emphasized on attention deployed over time..The research on AB play a key role in discovering the nature of attention,understanding the phenomenon of human psychology,comprehending the essence of consciousness,enhancing the efficiency of man-machine system.Based on the previous research,in 1992,Raymond and his group studied further on post target processing deficit by experiment,and forged a new word "Attentional Blink" to describe the phenomenon of post target processing deficit.At present,there are many kinds of theories that can explain the phenomenon of Attentional Blink,and Central Interference Theory has a leading status.According to this theory,the central processing system plays an important role in Attentional Blink.Because the T1 stimuli occupies the individual central processing channel,T2 stimuli cannot enter in time,which leads to the disruption of T2 stimuli caused by the following backward-masking.Such disruption causes the oblivion of T'2 stimuli and formation of Attentional Blink phenomenon.Hence the theory of central processing disruption theory emphasizes the TOA as well as the influence of backward-masking on AB effect.It also refers to the processing of the feature-based information,believing that the processing of T1 and T2 should pass the same central processing channel,in other words,AB effect will occur in any visual perception task. According to the same digit discrimination task that impaired subsequent letter discrimination for several hundred milliseconds,Awd found no disruption of subsequent face discrimination.These results suggest that all stimuli do not compete for access to a single resource for visual perception.This study aims to evaluate the existence of confignral channel,another channel besides feature-based channel;it also discusses the influence of exposure duration(ED)of face stimuli and report sequence on AB effect,by separating the confignral representations and feature-based representations of the face stimuli,the first two experiments discuss the AB effect when the feature based channel is occupied by both T1 and T2 stimulus by using digit discrimination task and feature-based face discrimination task.There are three condition in ED of face stimuli:30,60,90ms,and report sequence divided into:â‘ only report T2,â‘¡report T1 first,then T2,â‘¢report T2 first,then T1.When feature-based face serves as T1,AB effect is evident at ED=30ms and ED=60ms.However,when feature-based face serves as T2,AB effect is absent.The report sequence has no deficiencies in the first two experiments.The last two experiments discuss the AB effect when T1 and T2 occupy different channels by using digit discrimination task and configural face discrimination task.When configural face serves as T1,AB effect is evident at ED=30ms.At ED=60ms and ED=90ms,AB effect is partial and has deficiencies in report sequence.When configural face serves as T2,AB effect is absent.In conclusion,configural representation,which is different from feature-based representation,does exist in the AB mode.If T2 directly utilizes the representation system activated by T1,as long as TOA is short(<120ms),AB phenomenon will not occur.On the contrary,if T2 needs to activate a representation system different from the one activated by T1;even TOA is long(>500ms);AB phenomenon will occur when delay to report T1. Meanwhile,the results suggest that ED has great influence on the load of tasks.Other conditions identical,reducing the ED of T1 will increase the load of T1,thus increase the possibility of Tl's influence on T2,which leads to the occurrence of AB.As to the report sequence,AB phenomenon only occurs when T1 and T2 utilize different representation systems.When TOA is long,delaying to report T1 will results in more evident AB effect.