Funding for this research was provided by:
This research was supported by 2020 Comprehensive Discipline Construction Fund of Faculty of Education, Beijing Normal University
Article History
First Online: 13 September 2019
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: All materials and procedures in the present study were approved by the Institutional Review Board of the Beijing Normal University.
: Informed consent was obtained from all individual participants included in the study.