Kim, Gilsook https://orcid.org/0000-0003-4546-0193
Yi, Yejin https://orcid.org/0000-0002-3969-7138
Jahng, Kyung Eun https://orcid.org/0000-0002-7251-7864
Article History
Accepted: 31 January 2021
First Online: 11 February 2021
Declarations
: On behalf of all authors, the corresponding author states that all authors have no conflicts of interest to declare.
: The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
: This study used the panel data which are publicly available. According to Sahmyook University analyses of public data do not require IRB review.
: Written informed consent was provided by all participants when the Korea Institute of Child Care and Education collected the panel data.