“…This result is natural, due to the novelty of the Contextual method in comparison to the classical ones: Implicit and Explicit. It is important to mention that only 33 studies used all three methods at same time: (Kisel and Clougherty, 2010) (Naudet and Schwartz, 2010) (Moon et al, 2007a) (Bellekens et al, 2009) (Hsu et al, 2007) (Krstic and Bjelica, 2015). In addition, 98 studies (34.75% from the studies) used both Implicit and Explicit Profiling at same time, without the Contextual method.…”