Table 5.

Distribution of research methodologies used in review articles

Authors	Research methodology
(Albers et al., 2017; Atawneh et al., 2020; Brett, 2011; Calvo et al., 2017; Dyson & Frawley, 2018; Osuna Acedo et al., 2017; Troussas et al., 2020; Zhou et al., 2014)	Mixed method, Case studies
(Cabada et al., 2011; Chung et al., 2017; Fonseca Escudero et al., 2017; Lee et al., 2016; Lin et al. 2016; Ma et al., 2020; Manathunga & Hernández-Leo, 2018; Son et al., 2016)	Experimental design
(Laru et al., 2015; Lopez Garcia et al., 2016; MacCallum et al., 2017; Ryu & Parsons, 2012; Scott & Benlamri, 2010)	Case studies
(Choi & Kang, 2012; Garshasbi et al., 2019; Scott & Benlamri, 2010)	Action research qualitative research approach
(Balakrishnan, 2015; Huang et al., 2010; Muhisn et al., 2019; Osman et al., 2018; Reychav et al., 2015; Snoussi et al., 2020; Temdee, 2016)	questionnaire surveys and Empirical Study
(Alioon & Delialioğlu, 2019; Bhati & Song, 2019; Ramírez-Donoso et al., 2017)	design-based research approach, mixed methods
(Al-Abri et al., 2017; Garshasbi et al., 2019; Yannibelli & Amandi, 2012)	Algorithm generation and Experiments
(Sun et al., 2018)	Prototype
(Chew et al., 2018; Rodriguez-Andina et al., 2010)	Qualitative methods
(Zhu et al., 2019)	Control group
(Lu et al., 2015; Temdee, 2014)	pre-test as well as a post-test
(Yafie et al., 2020)	Ghirardini model is a modification of ADDIE and Expert Judgment
(Araújo et al., 2017)	As a proof of concept
(Chuang, 2015)	Delphi method