The Effect Of Object Dynamic Update On Attention To Blink

As the limitation of cognitive resource, the attentional selection has become a key cognitive process, which can make people complete the screening of a large amount of information in a complex environment and only input the useful information into cognitive processing system for processing. The environment we are living around contains both spatial scene information which can be immediately feel and information about time, for example, object-based information are on the space and there are two kinds of attention selection mechanism based on the time, which are the hotspot in cognition research field, the attentional blink and the inhibition of return.A number of studies have provided the evidence for the attentional selection of object-based information. The most typical is Egly’s two rectangle clues paradigm, which separat spatial and object information attention effectively in the process of attention selective. In this experimental paradigm, the same object advantage of attention selection can be observed. With the further research about object-based attention, the consideration of changed stimulus information in reality has been realized. They has proposed the object dynamic update hypothesis, point out that the allocation of attention resources can be changed by the updating of objece. This hypothesis are rised in recent years, and has been supported by several experiments. Attentional blink is proposed by Raymond et al in 1992, founded in the single task of a rapid sequence of classic presented stimuli. When two targets (T1 and T2) are inserted into a rapid serial visual presentation (RSVP) stream of nontar-gets, observers are impaired at identifying T2 when it is presented within half a second after T1. This transient drop in performance, or attentional blink (AB), has been attributed to a temporary unavailability of task-critical processing resources. The inhibition of return is also noticed as an attention change trend phenomenon in the time range. In a certain time range, the recognition of target which return back to the cued location wil be suppressed. Both Time and space attention effects function together in the same time in reality. How do we arrange our attention to overlap in the temporal dimension information is a worthwhile question.This study was conducted to explore the task switch of temporal and spatial information in our sensory systems by a rapid sequence visual present paradigm.Three experiments were performed by presenting a set of RSVP sequences of 4 letters flow in dynamic updating of object background, to study the object dynamic update effect on pay attention to adjust the mode of action of blink, and attentional control mechanisms in the space-time degree. In Experiment 1, we control the target letter of RSVP sequences tasks to present after the object updating is completed, observed that complete the update form stable representation of presenting T1 in the objects, subjects T2 recognition rate decreased with the guest body after the update, attentional effects blink than stranger body strong. But the experiment together did not exclude the inhibition effect of T2 on the same label on guest body, so in the second experiment we eliminate inhibitory tagging role. Experiment two before the T1 object update complete small guest body showed inhibition on the object tag is only updated before work, find a simple object update function so that the same attentional blink guest body removal effect disappears, after updating the recognition of T2 objects produce a gain function. In experiment three, we changed the stimulus presentation time interval, found that the attentional blink Lagl saving effect will only appear in the position under the same conditions.The results of this study show that:the processing of stimulus information cognitive system will be adjusted along with the time course of attention, in later stages of selection will still get visual stimuli from the environment in information feedback. Cognitive control system for processing of space and time two dimensional stimulus information by "integrative processing" mode, the spatial information and temporal information processing in the same processing mechanism, the same attention to time and space resources information occupation.