Vigil, K. B. (2019). Portable screen time and kindergarteners' attention with content as a possible moderator.  Frontiers in Education Technology, 2(3), p. 141-158, doi:10.22158/fet.v2n3p141

Vigil, K. B. (2019). Investigating the relationship between portable screen time and kindergarteners' attention with content as a potential moderator using a non-experimental causal comparative design (Order No. 13857414). Available from ProQuest Dissertations & Theses Global. (2210130296). Retrieved from https://lopes.idm.oclc.org/login?url=https://search-proquest-com.lopes.idm.oclc.org/docview/2210130296?accountid=7374