Zongpeng Sun1, Peter W Dicke2, Peter Thier3. 1. School of Psychology, Shaanxi Normal University, Xi'an, 710062, China. sunzp@snnu.edu.cn. 2. Department of Cognitive Neurology, Hertie Institute for Clinical Brain Research, 72076, Tübingen, Germany. 3. Department of Cognitive Neurology, Hertie Institute for Clinical Brain Research, 72076, Tübingen, Germany. thier@uni-tuebingen.de.