[1] Xidian Univ, Sch Foreign Languages, Xian 710071, Shaanxi, Peoples R China
[2] Shaanxi Normal Univ, Sch Psychol, Xian 710062, Shaanxi, Peoples R China
[3] Chinese Acad Sci, Inst Automat, Beijing 100190, Peoples R China
[4] Capital Med Univ, Beijing Tiantan Hosp, Dept Neurol, Beijing 100050, Peoples R China