Article History
Received: 28 June 2018
Accepted: 31 August 2018
First Online: 12 September 2018
Compliance with ethical standards
: All the authors have made substantial contributions to the following: the conception and design of the study, or acquisition of data, or analysis and interpretation of data; drafting the article or revising it critically for important intellectual content; and final approval of the version to be submitted. Having been actively involved, both personally and jointly, in substantive work that led to the report in the manuscript, the authors will hold themselves responsible for its content. No grant funding was received for this study, and the authors have no conflicts of interest to declare.
: All relevant ethical safeguards have been met in relation to protection of participants. An application for ethical approval of this study was submitted to the Institutional Review Board (IRB) of Alma College, Alma, Michigan. The project received expedited review and was approved by the IRB. In addition, permission letters were obtained from each school, and reverse parental informed consent and child assent were received for each participant in the study.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The authors declare that they have no conflict of interest.