This study aims to investigate the effects of using AI chatbots in Korean English education from a macro perspective. For this purpose, 19 experimental studies are selected to conduct a meta-analysis, synthesizing the results of 51 individual study cases. The results of this study are as follows: First, it is found that the overall effect size of using chatbots is more than medium size meaning that a chatbot is an effective tool to learn English. Second, in the aspects of linguistic competence and affective categories, each shows over medium sizes like the overall effect size. In details of the dependent variables, vocabulary and speaking in linguistic competence and motivation in affective categories, large effect sizes are shown. Third, the effect sizes are getting larger, as the younger the students are, the longer the experiment period lasts, and the more purpose-built the chatbot is. But the differences in the effect sizes in terms of these moderators (e.g., school level, experiment period, and chatbot type) are not significant. Lastly, it is suggested that follow-up studies are needed to collect a sufficient number of experimental study cases and subdivide the variables for performing a more detailed meta-anlysis.

Effects of primary English education using children’s literature have been extensively examined by many researchers in Korea during the past about two decades. This study aims to delineate the research domain by employing a meta-analysis of 31 primary studies that have been published in Korean refereed journals by February 2017. From the primary studies, 41 effects sizes were calculated based on the contrast of the means of two groups and 152 pre-to-post effect sizes based on the contrast of pretest and posttest scores. The results indicate that primary English education using children’s literature had overall a medium-sized effect (g = .60), with its effect being greater in the affective domain (g = .93) than in the cognitive domain (g = .37). More specifically, it was found that introducing children’s literature in the elementary English classrooms would bring about positive learning effects in the areas of vocabulary and reading and would be effective to develop positive learner interest and attitudes toward English learning. The results and their implications are further discussed.