... Adaptive elearning systems will either use the explicit model or use a questionnaire as an initial "cold start" data resource but continue with data collected through the adaptive platform, the assessments, or third-party platforms. (Ali et al., 2019), (Aljojo et al., 2016), (Almeida et al., 2019), (Alsobhi & Alyoubi, 2019), (Apoki et al., 2020), (Arsovic & Stefanovic, 2020), (Alshammari et al., 2015), (Araújo et al., 2020), , (Baharudin et al., 2017), (Boussakuk, 2020), (Bradáč & Smolka, 2020), (Budiyanto et al., 2017), (Drissi & Amirat, 2016), (Elkot, 2019), (Fasihuddin et al., 2016), (Hassan & Qureshi, 2018), (Lakkah et al., 2017), (Papanikolaou, 2015), (Siddique et al., 2019), (Supangat & Bin Saringat, 2020), (Tortorella & Graf, 2017), (Vaidya & Joshi, 2018) Implicit or automatic modeling learning process tracking 11 (Abech et al., 2016), (Aeiad & Meziane, 2019), (Anantharaman et al., 2019), (Andaloussi et al., 2019), (Christudas et al., 2018), (El Guabassi et al., 2018), (Hurtado et al., 2018), (Kolekar et al., 2018), (Kolekar et al., 2019), (Kurilovas, 2019), (Nalintippayawong et al., 2017) Assessment 4 (Aeiad & Meziane, 2019), (Sunil & Doja, 2019), (Hafidi & Bensebaa, 2015), (Dwivedi et al., 2018) Data Mining (social media etc.) 4 (Andaloussi et al., 2019), (Sweta & Lal, 2017), (Karagiannis & Satratzemi, 2020), (Tarus et al., 2017) Table 4 allows us to get meaningful insight into the correlation of learner modeling types and the data resources used. Having explicit modeling will mean no data source past the initial data used to create the learner model. ...