“…In a second step, the titles, abstracts, and publication format were scanned for relevance. Qualitative and purely descriptive studies, books, editorials (e.g., Ifenthaler et al, 2014), conference abstracts (not proceedings), and theoretical papers were excluded. To reduce selection bias, technical reports and case studies were included if data procedures were adequately presented (e.g., Milliron, Malcolm, & Kil, 2014), whereas scoping studies were eliminated (e.g., Gašević, Kovanović, Joksimović, & Siemens, 2014).…”