“…The first research question concerns the aspects of word knowledge investigated in the previous studies. To examine what aspects of word knowledge were investigated by researchers, 29 out of the 32 studies (91%) which indicated the aspect of word knowledge assessed were included for analysis (Tan and Nicholson, 1997 ; Nakata, 2008 ; Başoglu and Akdemir, 2010 ; Oberg, 2011 ; Azabdaftari and Mozaheb, 2012 ; Komachali and Khodareza, 2012 ; Kuo and Ho, 2012 ; Chien, 2013 , 2015 ; Nikoopour and Kazemi, 2014 ; Barkat and Aminafshar, 2015 ; Hamzehbagi and Bonyadi, 2015 ; Özer and Koçoglu, 2015 ; Galedari and Basiroo, 2016 ; Lavoie, 2016 ; Aminafshar, 2017 ; Saputri, 2017 ; Wu et al, 2017 ; Chen and Chan, 2019 ; Fukushima, 2019 ; Reynolds and Shih, 2019 ; Alhuwaydi, 2020 ; Hidayat and Yulianti, 2020 ; Lukas et al, 2020 ; Samad and Makingkung, 2020 ; Wulandari and Musfiroh, 2020 ; Yüksel et al, 2020 ; Xodabande et al, 2021 ).…”