“…In the previous studies of ELT challenges, a variety of data collection methods were adopted, namely survey, interview, and observation, among which surveys were used most frequently (Chen & Xu, 2009;Gong, 2020;Lalsangpuii, 2019;Mutar, 2019;Garton, 2013;Copland, Garton & Burns, 2014;Chen, Qi, Liang & Sha, 2018;Ayaz, Ozkardas & Ozturan, 2019;Chiou, 2014); Garton (2013), Ayaz, Ozkardas, and Ozturan (2019) and Copland, Garton, and Burns (2014) chose to use open-ended questions in the survey, while the other employed close-ended questions. Chiou (2014) and Chen, Qi, Liang, and Sha (2018) adopted a 4-point Likert scale in the questionnaire survey in order to "prevent neutral and ambiguous response" (Chiou, 2014, p.265) as well as to have the general information of participants' educational background, attitude toward the English-only instruction and difficulties in the English-only classroom.…”