• 감성과학
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• 제11권2호
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• pp.215-226
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• 2008

본 연구의 선행연구에서 사용자가 제품 사용 중 표출된 감성을 보다 간단하고 손쉽게 평가할 수 있도록 자기-보고 질문지형 스케일을 개발하였고, 본 연구에서는 휴대폰 사용 중 표출되는 사용자의 감성을 평가해 보았다. 전반적으로 사용성 측면을 상당히 고려하여 디자인한 제품이라고 할 수 있는 휴대폰의 경우 높은 '사용적 만족성'과 낮은 '불편성'이 표출되었다. 반면에 전반적으로 새로운 기능과 스타일에만 집중하여 사용자의 사용성 측면에 대해서는 다소 불편한 제품이라고 할 수 있는 휴대폰의 경우 낮은 '사용적 만족성', 높은 '불편성'이 표출되었지만 그 외 '심미성', '신규성', '유쾌성', '우수성'에서는 높은 값을 나타내었다. 본 연구의 결과를 가지고 성급하게 제품의 사용성과 사용자의 감성에 대한 결론을 내리기에는 다소 미흡하지만 향후 제품 경험 시간에 따라 표출되는 사용자의 감성변화를 분석함으로써 제품의 사용성과 사용자의 감성간의 관계를 보다 더 명확하게 밝혀낼 수 있으리라 기대한다.

• Educational Technology International
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• 제25권1호
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• pp.1-25
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• 2024

This study aims to analyze the impact of learners' usability perceptions of topic modeling-based visual feedback and generative AI interpretation on reflection levels in online discussions. To achieve this, we asked 17 students in the Department of Korean language education to conduct an online discussion. Text data generated from online discussions were analyzed using LDA topic modeling to extract five clusters of related words, or topics. These topics were then visualized in a network format, and interpretive feedback was constructed through generative AI. The feedback was presented on a website and rated highly for usability, with learners valuing its information usefulness. Furthermore, an analysis using the non-parametric Mann-Whitney U test based on levels of usability perception revealed that the group with higher perceived usability demonstrated higher levels of reflection. This suggests that well-designed and user-friendly visual feedback can significantly promote deeper reflection and engagement in online discussions. The integration of topic modeling and generative AI can enhance visual feedback in online discussions, reinforcing the efficacy of such feedback in learning. The research highlights the educational significance of these design strategies and clears a path for innovation.

• International Journal of Contents
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• 제9권3호
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• pp.29-34
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• 2013

This study attempted to compare usability of auditory interfaces, which is a comprehensive concept that includes safety, utility, effectiveness, and efficiency, in personal computing environments: verbal messages (speech sounds), earcons (musical sounds), and auditory icons (natural sounds). This study hypothesized that verbal messages would offer higher usability than earcons and auditory icons, since the verbal messages are easy to interpret and understand based on semiotic process. In this study, usability was measured by a set of seven items: ability to inform what the program is doing, relevance to visual interfaces, degree of stimulation, degree of understandability, perceived time pressure, clearness of sound outputs, and degrees of satisfaction. Through the experimental research, the results showed that verbal messages provided the highest level of usability. On the contrary, auditory icons showed the lowest level of usability, as they require users to establish new coding schemes, and thus demand more mental effort from users.

• Educational Technology International
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• 제21권2호
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• pp.125-153
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• 2020

The advancement of virtual reality technology offers various locomotion options that support users' navigation behaviors in a virtual reality environment. This study was aimed at examining the effects of two navigation methods-joystick-controlling and walking-around-on users' perceived usability, behavioral engagement, and virtual presence. Fifty South Korean college students were recruited in the study, and they were assigned randomly to one of the two navigation conditions. Participants from each group were asked to observe a 3D object and complete the surveys. They were then asked to repeat the procedure with a 2D image. Using repeated-measures ANOVAs and MANOVA, we found that users using joystick-controlling reported higher usability and showed superior performance to the walking-around group on two tasks. Participants reported a higher behavioral engagement when observing the 2D image. Besides, they perceived a significantly higher virtual presence when observing the 2D image. Finally, we discussed the implications of the findings for the navigation method design.

• 한국비블리아학회지
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• 제34권2호
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• pp.275-294
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• 2023

본 연구에서는 메타버스 내 공공도서관의 사용성을 분석하고, 도서관 메타버스 플랫폼의 사용성 및 몰입감에 영향을 미치는 요소들에 대하여 조사하였다. 이를 위하여 메타버스 플랫폼 게더타운 내에 가상 도서관을 구축, 운영하고 있는 강북문화정보도서관, 대전한밭도서관, 마포중앙도서관을 조사 대상으로 하였다. 60명의 대학생들을 대상으로 수행된 온라인 설문 조사와 실험 결과, 모든 도서관에서, 학습성과 사용성 간에 강한 정비례 상관관계가 나타났으며, GUI 지표와 몰입감 간에도 상당히 강한 상관관계가 나타났다. 또한, 강북문화정보도서관의 학습성 및 사용성이 다른 도서관들보다 통계적으로 유의미하게 높은 것으로 나타났으며, 한밭도서관의 GUI 지표와 몰입감이 다른 도서관들보다 통계적으로 유의미하게 높은 것으로 나타났다. 한편 사용자들이 메타버스에 접속 시, 동시에 접속 중인 다른 사용자가 없는 경우가 많았으며, 이로 인해 도서관들의 상호작용성에 있어서는 통계적으로 유의미한 차이가 없는 것으로 나타났다. 이 연구에서는 도서관별 메타버스 플랫폼의 특징, 장점과 단점에 대해서도 조사하였다. 본 연구의 결과는 향후 공공도서관의 메타버스 플랫폼 사용성 개선에 활용될 수 있을 것으로 기대된다.

• Journal of Computing Science and Engineering
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• 제4권1호
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• pp.80-95
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• 2010

In order to truly integrate e-Learning system into regular curriculum at a university, mobile access to Learning Management Systems has to be enabled. Mobile devices have the potential to be integrated into the classroom, because they contain unique characteristics such as portability, social interactivity, context sensitivity, connectivity and individuality. Adoption of Learning Management Systems by students is still on the low rate, mostly because of poor usability of existing e-Learning systems. Our initial research has confirmed this hypothesis. Usability issue is rising to the higher level on the mobile platform, because of the mobile devices' limited screen size, input interfaces and bandwidth, and also because of the context of use. Our second hypothesis was that it is wrong to consider a mobile device as a surrogate for desktop or laptop personal computer (PC). By just adopting the existing Learning Management System on mobile devices with adaptive technologies such as Google proxy, we do not acquire the satisfactory results. Usability can prove to be even lower compared to desktop application. One possible solution to the problem could be development of rich client applications for today's mobile devices that would raise the usability to a higher level. We developed a PocketPC prototype application by using user-centered design principles, which we presented as a third alternative in usability research conducted among university students. Results gathered in such a way have confirmed that development of e-Learning system, in order to be widely accepted by students, needs to have the user(student) in the center of development process.

• International Journal of Internet, Broadcasting and Communication
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• 제12권1호
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• pp.73-80
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• 2020

The OECD surveys the questionnaire on the background of ICT every three years since 2003. In this study, we compare and analyze the changes in ICT accessibility and ICT usability of Korean students in 2015 and 2018 using the ICT background data of OECD PISA. ICT accessibility refers to the degree of access to ICT equipment at school or at home. There are 10 items of accessibility surveys at schools used by PISA, and 11 items at home. ICT usability refers to how much ICT equipment is used at or outside of school for learning or non-learning purposes. There are ten items for surveying usability at school, and twenty-four items for surveying usability outside of school. In the analysis of this study, the arithmetic mean of the items is used. As a result, Korean students' accessibility at school improved from 25.48% in 2015 to 40.40% in 2018, and from the lowest group in 2015 to below-average group in 2018. In terms of students' usability at school, we analyzed the percentage of students who use the ICT equipment 'almost every day' and the students who use it 'everyday'. Both 2015 and 2018 are among the lowest. Accessibility at home is higher in 2018 than in 2015, and belongs to the average group of OECD countries in 2018. ICT Usability for learning purposes outside of school is the lowest group in both 2015 and 2018. ICT Usability outside of school for non-learning purposes is in the average group of OECD countries. As a result of this study, we can see that Korea's digital literacy education is weak compared to other OECD countries. Prior to education about the Fourth Industrial Revolution, investment in digital literacy education is needed.

• 대한인간공학회지
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• 제36권5호
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• pp.437-446
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• 2017

Objective: This study aims to draw an efficient UI design by comparing the usability of App drawer and single-layered home screens, which are smartphone home screens. Background: Because smartphone home screen is frequently used including the installation, deletion, and editing of APPs, it should be designed with easily controllable information structure. There is a need to seek a user-friendly UI by comparing the usability of App drawer and single-layered home screens, of which methods to search Apps are different. There is also a need to examine an efficient UI and the factors to improve from the user perspective. Method: This study targeted 30 Android OS and iOS users to evaluate the App drawer and single-layered home screens, of which UI structures are different. Each participant was instructed to carry out an App searching task and App deleting task, and the execution time and the number of errors were measured. After the tasks were completed, they evaluated satisfaction through a questionnaire survey. Results: In the App searching task with low task level, there was no difference in execution level between the App drawer and single-layered home screens. However, the single-layered home screen showed higher efficiency and accuracy in the App deleting task with high task level. As for the group difference according to use experience, there was no difference in satisfaction among Android OS users, but iOS user satisfaction with single-layered home screen with which they were familiar was higher. Conclusion: As for home screen usability, the single-layered home screen UI structure can be advantageous, as task level is higher. Repulsion was higher, when users, who had used easier UI, used complex UI in comparison with user satisfaction, when users familiar with complex UI used easier UI. A UI indicating the current status with clear label marking through a task flow chart-based analysis, and a UI in which a user can immediately recognize by exposing hidden functions to the first depth were revealed as things to improve. Application: The results of this study are expected to be used as reference data in designing smartphone home screens. Especially, when iOS users use Android OS, the results are presumed to contribute to the reduction of predicted barriers.

• 한국문헌정보학회지
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• 제41권3호
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• pp.181-199
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• 2007

본 연구는 웹 정보로부터 이용자가 원하는 정보를 효율적으로 검색, 도출하기 위한 방안으로 시각화된 기법을 제시하였다. 이용자를 기반으로 한 시각화 기법의 사용성을 평가하기 위해 먼저, 시각화에 대한 개념 및 사용성 평가 요소를 분석한 후 현재 상용화 되고 있는 웹 검색 시각화 시스템인 searchCrystal과 KartOO를 선정해서 사용성을 평가하였다. 그 결과 시각화의특징을 살려서 디자인 된 시스템은 이용자로 하여금 더 친숙하고 효율적인 인터페이스 환경을 제공하는 것으로 나타났다.

• 한국조리학회지
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• 제18권1호
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• pp.77-90
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• 2012

본 연구는 쇠고기이력추적제를 이용하는 형태에 영향을 미치는 주는 요인간의 인과관계를 체계적으로 분석함으로써 쇠고기이력추적제를 활용하여 소비자가 안전한 식생활을 영위할 수 있도록 하는데 본 연구의 목적이 있다. 본 연구는 쇠고기이력추적제의 TAM, 사용의도에 대한 인과관계를 검증하기 위해 서울소재 백화점, 대형마트, 축산물전문매장 등을 이용하는 고객들이 조사에 참여하였다. 분석결과 첫째, 쇠고기이력추적제가 정보품질(t=3.872), 사회적 영향(t=1.938)이 높을수록 사용용이성은 유의적으로 높게 나타나는 것으로 밝혀졌다. 둘째, 식품이력추적제의 사회적 영향(t=2.014), 정보접근성(t=2.016), 지각된 위험(1.910)이 높게 나타날수록 지각된 유용성은 유의적으로 높게 나타나는 것으로 밝혀졌다. 셋째, 사용용이성(t=5.826)을 높게 지각할수록 지각된 유용성이 높게 나타나는 것으로 분석되었다. 넷째, 지각된 유용성(t=4.264)을 높게 지각할수록 사용 의도가 높게 나타나는 것으로 분석되었으며, 사용용이성(t=0.682)을 낮게 지각할수록 사용의도가 낮게 나타나는 것으로 분석되었다.