This study explores the effects of teacher feedback on engineering students’ perceptions of learning a business subject and English development in the context of English-medium instruction (EMI). Using a mixed method, it examines specific contributions of teachers’ extensive feedback to the students’ emerging perceptions of interdisciplinary education and EMI. The quantitative section includes questionnaire responses of two groups of students enrolled in four sections of an entrepreneurship course: the control group (CG) in which the students received limited feedback in the lecture-style EMI (n=137) and the experimental group (EG) of extensive corrective feedback (n=133). These results are cross-examined by a semi-structured focus group interview with four respondents. The analysis shows that the university seniors’ mean satisfaction score with EMI, despite staying around the mid-point, was higher than that of the others, and significantly more so than the freshmen group. Notably, EG students appreciated EMI more than CG students. Subsequent findings establish that extensive feedback correlates with the increased positivity towards learning entrepreneurship and, more importantly, English development. This study thus proposes English programs for specific purposes and a support system including an EMI-specialized teaching methodology.

비고츠스키(Vygosky)의 사회문화 이론은 특히 제2외국어 학습에 있어서 중요한 의미를 갖는다. 학생들은 협동적인 학습 활동을 하면서 영어를 더 잘 배우고 성장하며 발전한다. 게다가 쓰기단계는 사회적 상호작용을 통해 복잡한 인식과정을 거쳐 향상되고 발전한다. 본 논문은 쓰기 수업을 하는 학생들로부터 피드백을 도출하기 위해 구글 독스(Google Docs)를 이용하여 사회문화이론이 쓰기수업에 어떻게 적용되었는지를 설명하고자 한다. 본 연구는 한국 모 대학의 영어수업에서 진행되었고, 참가자는 영어교육과 학생 11명이다. 연구자는 반성적 실천(Reflective Practice), 비계설정(Scaffolding), 동료 피드백 촉진(Peer Feedback Facilitation) 등의 과정을 통해 강사가 학생들이 한 문장에서 시작하여 단락까지 씀으로써 결국은 영어로 에세이를 쓸 수 있게 효과적으로 준비할 수 있었다. 이 연구에서 다섯 단락 정도의 에세이를 쓸 수 있을 만큼 학생들의 작문실 력은 향상되었고, 격려를 통해 서로 성장하고 발전할 수 있었다. 또한 이 과정에서 학생들의 사회적 기술과 공감능력이 향상되었고 수업 분위기도 개선되었다. 이러한 기술적인 동료 피드백은 동기부여를 위한 효율적인 방식이며, 학생들에게는 영어쓰기학습에서 자신감을 주는 것으로 나타난다. 사회문화이론의 적용을 통해 학생들은 제2외국어에 대한 지식을 습득 하고 더 발전시킬 수 있으며, 낮은 단계의 이해에서 더 높은 수준의 지식 으로 나아가게 하는 상호작용의 시너지를 만들어 낸다.

The present study aimed at investigating the effects of the two types of teacher feedback―direct corrective feedback (DCF) and metalinguistic explanation (ME)―on the development of EFL learners’ knowledge of the English indefinite article and on their use of it in writing. For this study, 58 college students classified into three groups (two experimental groups and one control group) took the error correction test and performed three writing tasks. The results of the study are 1) there was no group effect of the two types of feedback in the development of their explicit knowledge of the target feature in the test, whereas a time effect was found that their knowledge of the target feature developed significantly after the treatment; and 2) no group differences were found between the two types of feedback in the use of the target feature in the revised writing and among the three writings, though the DCF group outperformed the ME group in the accurate use of the target feature in writing. Theoretical and pedagogical relevance of the findings is addressed.

Background: Augmented somatosensory feedback stimulates the mechanoreceptor to deliver information on bodily position, improving the postural control. The various types of such feedback include ankle-foot orthoses (AFOs) and vibration. The optimal feedback to mitigate postural sway remains unclear, as does the effect of augmented somatosensory feedback on muscle co-contraction. Objects: We compared postural sway and ankle muscle co-contraction without feedback (control) and with either of two forms of somatosensory feedback (AFOs and vibration). Methods: We recruited 15 healthy subjects and tested them under three feedback conditions (control, AFOs, vibration) with two sensory conditions (eyes open, or eyes closed and the head tilted back), in random order. Postural sway was measured using a force platform; the mean sway area of the 95% confidence ellipse (AREA) and the mean velocity of the center-of-pressure displacement (VEL) were assessed. Co-contraction of the tibialis anterior and gastrocnemius muscles was measured using electromyography and converted into a cocontraction index (CI). Results: We found significant main effects of the three feedback states on postural sway (AREA, VEL) and the CI. The two sensory conditions exerted significant main effects on postural sway (AREA and VEL). AFOs reduced postural sway to a level significantly lower than that of the control (p = 0.014, p < 0.001) or that afforded by vibration (p = 0.024, p < 0.001). In terms of CI amelioration, the AFOs condition was significantly better than the control (p = 0.004). Vibration did not significantly improve either postural sway or the CI compared to the control condition. There was no significant interaction effect between the three feedback conditions and the two sensory conditions. Conclusion: Lower-extremity devices such as AFOs enhance somatosensory perception, improving postural control and decreasing the CI during static standing.

본 연구의 목적은 코칭리더십이 조직구성원들의 혁신행동에 미치는 영향을 알아보고, 그 과정에서 긍정피드백과 창의적 자기효능감의 다중 매개효과를 실증적으로 검증하고자 하였다. 이를 위해 국내 기업의 다양한 업종의 구성원 중 총 396명에게 설문하여 345명으로부터 자료를 수집하였고, SPSS 25.0, AMOS 25.0를 사용하여 설문의 타당도를 Process Macro 3.0을 사용하여 가설을 검증하였다. 연구결과, 리더의 코칭리더십은 긍정피드백, 창의적 자기효능감, 혁신행동에 정(+)의 영향을 미치는 것으로 나타났다. 특히 긍정피드백은 창의적 자기효능감에 정(+)의 영향을 미치며, 리더의 코칭리더십과 혁신행동의 관계에서 정(+)의 매개효과를 보였다. 창의적 자기효능감은 코칭리더십과 혁신행동 사이에서 정(+)의 매개효과를 보였고, 긍정피드백과 창의적 자기효능감은 코칭리더십과 혁신행동 간의 다중매개효과를 갖는 것으로 나타났다. 이러한 연구결과의 시사점은 첫째, 수평조직구조에서 주목받고 있는 코칭리더십이 긍정피드백과 창의적 자기효능감을 통해 조직 구성원의 혁신행동을 향상시킨다는 것이다. 둘째, 조직의 성과 창출을 위해서는 조직 구성원의 혁신행동이 필요한 바, 이를 위해 리더의 코칭리더십을 향상시킬 수 있는 다양한 방안으로 모색하고 적용해야 한다는 실무적 시사점을 제시하였다.

This is a longitudinal case study using a mixed-methods research design to track how two Korean university students improved their English writing competence over one year with the aid of automated writing evaluation (AWE) program, Criterion. The participants wrote essays outside of class every month for one year, submitting first and later second drafts. The participants completed a TOEIC writing test at the beginning and end of the study; students’ reflections on their writing development, obtained through interviews and journal entries, were also examined. A comparison of scores, errors, and quantitative measures of fluency and grammatical complexity indicated writing improvement. Both participants used Criterion feedback effectively to render informed judgments and valid corrections. Essay revision based on Criterion feedback yielded more self-directed learning and greater comfort with writing in content courses. It is suggested that the effect of AWE feedback transfers to long-term improvement. The results point to the potential benefit of AWE use in individual out-of-class writing practices.

Background: Flexible flat foot is that the medial longitudinal arch collapses in weight bearing and returns normal arch when weight is removed and the weight bearing shifts toward medial part of the foot, which can cause pathological problems in the alignment of the lower extremities and the entire body. Objective: To compare the foot pressure for adults with flexible flat foot. Design: Quasi-Experimental Study Methods: 24 participants with flexible flat foot were recruited and were randomly divided into Visual feedback Short Foot Exercise (VSFE) group and Short Foot Exercise (SFE) group. To compare changes of foot pressure about pre and post intervention, the contact pressure measurement was conducted. Results: In the VSFE, significant differences were observed for the foot pressure of the 1st toe, 1st, 3rd and 4-5th metatarsal, midfoot, medial and lateral heel (p<.05). The foot pressure of the 3rd and 4-5th metatarsal, midfoot showed significant differences in the SFE (p<.05). The contact pressure of the 1st toe, 3rd metatarsal showed significant differences between the groups. Conclusions: Visual feedback short foot exercise can be useful for moving the pressure from medial to lateral part, and can prevent possible pathological problems.

This study investigated the effects of negotiation in the process of providing written corrective feedback (WCF) by comparing three different patterns: non-negotiation, minimal negotiation, and extended negotiation. The data were collected from three intermediate academic English classes at a university in Korea. Each class was exposed to different degrees of negotiation while they received WCF for two target forms, the past verb forms and the English articles, in their written production (text re-construction tasks). Their accuracy improvement was measured by text-reconstruction writing tasks and error correction tests. The study found that the use of negotiation affected accuracy improvement of the target forms; however, its effectiveness varied depending on the target forms and measurements. For the past tense, negotiation, regardless of its amount, resulted in more accuracy improvement than non-negotiation in both text re-construction tasks and error correction tests. However, for the English articles, negotiation operated differently: extended negotiation significantly brought about more accuracy development in both measurements, but the difference between minimal negotiation and non-negotiation was only observed in the error correction test, not in the text re-construction task.

This study examined the correlation between power error (PE) and velocity error (VE) according to the condition and frequency of self-controlled feedback (SCF) during knee extension. One hundred participants were randomly assigned to 30% SCF, 70% SCF, 30% yoked feedback (YF), 70% YF and control group, respectively. The SCF group was provided with feedback when they requested it, whereas the YF group did not influence the feedback schedule. Participants in the control group were not given any visual feedback during the experiment. The isotonic, isometric, and isokinetic dynamometer (PRIMUS RS, BTE, USA) was used to measure the power and velocity error during knee extension. The collected data was analyzed using a Pearson test and SPSS 21.0. The correlation between PE and VE according to the condition and frequency of feedback on each phase during knee extension was significant. Both PE and VE were significantly higher when the feedback was provided with high frequency, passive, and no feedback. Our study suggests that application of SCF can help to improve the proprioception of the healthy person while reducing errors through low frequency and active feedback.

People write reviews of numerous products or services on the Internet, in their blogs or community bulletin boards. These unstructured data contain important emotions and opinions about the author's product or service, which can provide important information for future product design or marketing. However, this text-based information cannot be evaluated quantitatively, and thus they are difficult to apply to mathematical models or optimization problems for product design and improvement. Therefore, this study proposes a method to quantitatively extract user’s opinion or preference about a specific product or service by utilizing a lot of text-based information existing on the Internet or online. The extracted unstructured text information is decomposed into basic unit words, and positive rate is evaluated by using existing emotional dictionaries and additional lists proposed in this study. This can be a way to effectively utilize unstructured text data, which is being generated and stored in vast quantities, in product or service design. Finally, to verify the effectiveness of the proposed method, a case study was conducted using movie review data retrieved from a portal website. By comparing the positive rates calculated by the proposed framework with user ratings for movies, a guideline on text mining based evaluation of unstructured data is provided.

High quality and timely assessment feedback is central to student learning in higher education; however, written feedback has many limitations. One of the innovative approaches to delivering feedback to EFL learners is individualized audio-visual feedback (AVF) using screencast technology. Previous research on AVF has been extensively descriptive and mostly focused on student preferences for feedback and evaluation of various screencast software. The present study employed a mixedmethod design using pre-post writing tasks and pre-post questionnaires to investigate what particularly beneficial affordances this type of media-rich feedback might offer for writers in the English-Medium Instruction (EMI) classroom, to identify the effects of AVF on changes in learners’ motivation, and to explore students’ perceptions towards screencast feedback. The results suggest that AVF is positively received by EFL learners and that simultaneous visual cues and detailed explanations promote better understanding, engagement, and active listening. In addition, AVF significantly improves learners’ writing performance and academic motivation. The paper concludes with practical implications and suggestions for further research.

The study investigated the effects of recasts and prompts on learning language forms that arose incidentally in dyadic interaction, focusing on the degree of explicitness of each type of feedback and learner proficiency levels. The data were collected from 64 beginning and upper-intermediate English learners of Korean. Thirty-one beginning learners were randomly assigned to a feedback group and to a control group, and thirtythree upper-intermediate learners were also assigned to a feedback group and to a control group. Each learner was paired with an English speaker and worked on a picture-sequencing task. The learners in the feedback groups received recasts or prompts on their erroneous utterances while the learners in the control groups did not. The effects of feedback were measured by pre-interaction picture descriptions and immediate and delayed post-interaction correction tasks. The study found that both recasts and prompts had some effects on learning the targeted forms, and more explicit forms of each feedback resulted in a higher rate of correction. The beginning learners took more advantages of recasts relative to the upper-intermediate learners, and explicit prompts worked better for the upper-intermediate learners. The effects of prompts sustained longer than recasts in both levels.