An, H., & Sung, E. (2014, September). The Effects of BAND(Mobile Social Network Service) on the English Writing Abilities and Affective Domains of Korean Elementary School Students. Paper presented at the meeting of KAMALL Annual Conference 2014, Seoul, Korea. [Abstract] The use of SNS (Social Network Service) for writing activities has become a popular contemporary practice. SNS can provide students with flexible time schedule and allow instructors to send instant feedback. There has been previous research on English teaching using game applications, words, short messages, and communication styles (Hui, 2012;Kim, 2013; Park, 2013; Yoon, 2014). However, there has been no study exploring the effects of English diaries using private SNS. This study investigates the effects of BAND(mobile SNS)-based English diaries on the writing abilities of Korean elementary school students, focusing on fluency and accuracy. In addition, this study examines whether the affective domains (i.e. interest and self-confidence) are also influenced by BAND-based English diaries. The subjects of this study were 50 sixth graders from a public elementary school in the city Kwangju. The students were divided into two groups. An experimental group consisted of 25 students who kept writing BAND-based diaries, and a control group was composed of 25 students who kept writing paper-based diaries. The students in the experimental group didn’t have to be afraid of writing in public because BAND is a private SNS unlike the other SNS. A pre-writing test was administrated before the eight week experiment began, and a post-writing test was done upon its completion. During the experiment, both the experimental and control groups kept English diaries once a week for 8 weeks. The teacher proposed a writing topic for the English diaries every Monday or students could choose the topic by themselves. The control group received feedback on paper while the experimental group received feedback through the ‘Band’. In order to analyze the data in terms of fluency, we contrasted the number of words and sentences in both pre and post tests. Regarding accuracy, grammatical errors were counted on pre and post tests and calculated into percentages. The following graphs show the results of pre and post tests in regards to the number of words and sentences. The results revealed that the experimental group showed more progress in terms of fluency than the control group. The students were often able to communicate with the teacher and were highly motivated by the instant feedback they received through BAND. However, there were no significant differences in accuracy between the two groups. The students in the experimental group seemed to focus on fluency when they wrote their diaries and also got more content- based feedback than formal feedback from the teacher. [....]