Study procedure
RA
One research assistant (RA), who was not involved in this study, randomly divided the 22 participants into two groups: an experimental group (n = 11) and a control group (n = 11), using a research randomizer site (Before the intervention, the RA sent a URL to participants as well as the participation schedule (date and time). Using the URL sent, the experimental group accessed a Zoom classroom for LT and the control group accessed the TV show. After completing two-weeks of intervention, a post-test of the two groups was conducted online. Among the 22 participants, five were excluded: one participant had registered for this study but did not show up for the baseline survey, and four participants in the experimental group had withdrawn because of their busy schedules. No participant from the control group was excluded.After the intervention, the researchers asked participants in the experimental group to participate in an exit phone interview, and five participants volunteered. Using a semi-structured questionnaire, four questions were asked: 1) what was your participation experience in the four DLT sessions conducted through a virtual meeting?; 2) what did you feel about DLT, whether good or bad?; 3) what do you think about the program’s effects, if any, and why?; 4) do you perceive any changes after participating in this program, compared to before? Each interview lasted between 30 and 40 minutes. All interviews were audio-recorded and had verbatim transcription. The participants who completed the study were compensated with 17.33 USD (20,000 KRW), and those who participated in the exit interview were offered an additional 8.67 USD (10,000 KRW). The specific procedure is illustrated in 