1. Department of Psychology; Peking University; Beijing China
2. Department of Basic Education II; Ministry of Education; Beijing China
3. Department of Applied Social Science; Polytechnic University of Hong Kong; Howkoon Hong Kong
4. State Key Laboratory of Cognitive Neuroscience and Learning; Beijing Normal University; Beijing China
5. Department of Special Education, Peabody College of Education and Human Development; Vanderbilt University; Nashville TN USA
6. School of languages and communication; Beijing Jiaotong University; Beijing China
7. The Joint PekingU-PolyU Center for Child Development and Learning; Peking University; Beijing China