4.1.2. Procedure
This study was approved by the Ethics Review Board of the Central China
Normal University. Paper questionnaires were distributed in the
libraries and study rooms of universities in Wuhan. At the beginning of
the questionnaire, all participants were fully informed that their
anonymity was guaranteed, and they could choose to withdraw at any time.
If they completed the study, a small gift (about 0.5 U.S. dollars at the
time of the study) was provided.
All participants also provided
demographic information.