机构：[a]Department of Rehabilitation, Xuanwu Hospital, Capital University of Medical Science,康复医学科首都医科大学宣武医院[b]Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences[c]State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing,China
The dynamic mechanisms of the early event-related potential scale effect of different attentive regions in the brain was studied. The paradigm of this experiment is the precue-target visual search paradigm by event-related potential technique. The results showed that the reaction time was shortened with the reduction of cue scale, a cue to how big the search area would be, and fixed target stimulus, while the amplitudes of PI and NI components of event-related potentials increased. These results not only provided the electrophysiological evidences that supported the zoom-lens theory, but also indicated that the zoom-lens effect happened at the early selected attention period. The results also showed that there existed two kinds of separation in the P2 effect.
基金：
theNational Nature Science Foundation of China (Grant no. 30540058, 30325026, 30370489, 30500166),
the Capital Nature Science Foundation (Grant no. 7052030), the Capital Excellence Foundation,
the key Research Programof the Chinese Academy of Science (Grant no. 30325026)
and the Key Research Programof theNational ScienceTechnicalMinistry (Grant no. 2002CCA0100).
