• 한국정보시스템학회지:정보시스템연구
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• 제32권3호
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• pp.133-150
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• 2023

Purpose This study aims to develop classification models using a decision tree algorithm to identify core keywords and rules influencing online consumer review evaluations for the robot vacuum cleaner on Amazon.com. The difference from previous studies is that we analyze core keywords that affect the evaluation results by dividing the subjects that evaluate online consumer reviews into self-evaluation (star ratings) and peer evaluation (helpfulness votes). We investigate whether the core keywords influencing star ratings and helpfulness votes vary across different products and whether there is a similarity in the core keywords related to star ratings or helpfulness votes across all products. Design/methodology/approach We used random under-sampling to balance the dataset. We progressively removed independent variables based on decreasing importance through backwards elimination to evaluate the classification model's performance. As a result, we identified classification models that best predict star ratings and helpfulness votes for each product's online consumer reviews. Findings We have identified that the core keywords influencing self-evaluation and peer evaluation vary across different products, and even for the same model or features, the core keywords are not consistent. Therefore, companies' producers and marketing managers need to analyze the core keywords of each product to highlight the advantages and prepare customized strategies that compensate for the shortcomings.

• 대한간호학회지
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• 제37권4호
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• pp.442-452
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• 2007

Purpose: The purpose of this study was to develop an online education on death, 'successful life, and beautiful death' for university students and to evaluate students' changes regarding perception of self and death. Method: A quasi-experimental design was used with one experimental group pre-post test. Subjects were 154 students who enrolled for online education about death for 16 weeks. SPSS/WIN 12 was used for analyzing data. Result: The results of the study clearly indicated this class had positive effects on students' perception of death-related concepts, attitudes toward death, and self-concept, showing statistically significant higher scores in post-tests than in pre-tests. In addition, the result of class evaluations showed a positive response, Conclusion: Findings suggested that this online education about death was effective to change students' perceptions of death related knowledge, attitude toward death, and self-concept. Recommendations for further studies were provided.

• Fashion, Industry and Education
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• 제15권2호
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• pp.1-10
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• 2017

The purposes of this study were to explore (1) how fit reviews differ among height groups and (2) how overall numerical ratings differ depending on height groups and ifferent types of fit reviews. Content analysis was used to analyze systematically sampled online consumer reviews (OCRs) of formalwear dresses rented online. In part 1, 201 OCRs were analyzed to develop the coding scheme, which included three aspects of fit (physical, aesthetic, and functional), valence (negative, neutral, positive), and overall numerical rating. In part 2, 600 OCRs were coded and statistically analyzed. Differences in frequency were not found among height groups for any types of mentions (negative, neutral, and positive) in terms of the three aspects of fit in the OCRs. Differences in overall mean ratings were not found among height groups. Interestingly, valence of each aspect of fit reviews affected mean numeric ratings. This study is new in examining relationships among textual information (i.e., fit reviews), numerical information (i.e., numerical rating), and reviewer's characteristic (i.e., height). The results of this study offered practical implications for etailers and marketers that they should pay attention to the three aspects of fit reviews and monitor garments with negative fit evaluations for lower ratings. They may attempt to increase ratings by providing customers recommendations to get a better fit.

• Journal of Korea Trade
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• 제26권6호
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• pp.83-95
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• 2022

Purpose - With the recent spread of COVID-19, U.S. consumers' consumption pattern is changing towards purchasing large-capacity products, as they stay at home longer. Thus, the current research investigates the effects of box shape and component diversity for large-sized products on product evaluation in logistic business. Moreover, this research examines that information-processing fluency mediates the moderating effects of box shape and product components on target evaluations to confirm psychological mechanism for generating this effect. Design/methodology - In order to examine the hypotheses, the current research conducts two online experiments. The 184 participants (Study 1), and 205 participants (Study 2) of U.S. nationality were recruited through Amazon Mechanical Turk. This research analyzes the data by using SPSS 25 and PROCESS macro 4.0. Findings - Study 1 demonstrates that when the height of a box is greater than its width, products with single components promote positive target evaluations, while when the width of box is greater than its height, products with a variety of components lead to positive target evaluations. Study 2 shows that the same results are replicated in other product categories and with different box shape ratios. Moreover, Study 2 also finds that the ease of information processing mediates the interaction effects of box shape and component diversity on U.S. consumers' target evaluations. Originality/value - The current research has originality in that it investigates the effect of box shape and product composition diversity on U.S. consumer product evaluation from the perspective of information-processing theory Moreover, this research has practical implications for global traders who prepare for entering the U.S. market.

• Management Science and Financial Engineering
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• 제11권3호
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• pp.19-45
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• 2005

Collaborative filtering is one of the most common methods that e-commerce sites and Internet information services use to personalize recommendations. Collaborative filtering has the advantage of being able to use even sparse evaluation data to predict preference scores for new products. To date, however, no in-depth investigation has been conducted on how the data sparsity effect in customers' evaluation data affects collaborative filtering-based recommendation performance. In this study, we analyzed the sparsity effect and used a hybrid method based on customers' evaluations and purchases collected from an online bookstore. Results indicated that recommendation performance decreased monotonically as sparsity increased, and that performance was more sensitive to sparsity in evaluation data rather than in purchase data. Results also indicated that the hybrid use of two different types of data (customers' evaluations and purchases) helped to improve the recommendation performance when evaluation data were highly sparse.

• 컴퓨터교육학회논문지
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• 제11권5호
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• pp.19-32
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• 2008

창의적 문제해결에 대한 연구들은 온라인 환경에서나 면대면 환경 모두 대부분 개인적 측면에서 접근이 이루어지고 있어 협동적인 측면에서의 접근이 필요하다. 온라인 환경은 면대면 환경보다는 협동적 상호작용 촉진과 창의적 문제해결을 위한 효과적인 환경을 제공하고 있다. 따라서 본 연구는 협동을 통해 창의적 문제해결을 할 수 있는 온라인 지원 시스템을 개발하는 데 목적이 있다. 이를 위하여 본 연구는 첫째, 기존의 창의적 문제해결모형으로부터 온라인 환경에서 적합한 창의적 문제해결을 할 수 있는 모형을 도출하였다. 둘째, 통합된 창의적 문제해결모형을 토대로 협동 창의적 문제해결 모형의 온라인 지원 시스템을 위한 설계 원리를 개발하고 이에 기초하여 시스템을 개발하였다. 마지막으로 본 연구는 시스템의 향상을 위해서 형성평가를 실시하였다. 개발된 시스템은 협동 창의적 문제해결을 위한 효과적이고 효율적인 온라인 학습 환경을 제공해 줄 것이다.

• 컴퓨터교육학회논문지
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• 제15권6호
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• pp.33-41
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• 2012

본 논문은 온라인 평가 문항 관리 시스템 및 방법에 관한 것이다. 제안하는 시스템은 학습자 정보 데이터베이스, 영역별, 난이도별로 분류된 문항을 저장하는 문제 은행 데이터베이스로 구성된다. 문제은행 데이터베이스는 특정 학습자 또는 특정 학습에 대한 문항을 선택하는 문항 선제부, 특정 학습자 또는 특정 학습에 대한 문제지를 제작하는 문제지 제작부, 문제지를 저장하였다가 온라인 테스트를 수행할 때 출력하는 문제지 은행 데이터베이스를 포함한다. 학습자가 온라인 테스트에 제출된 문항들에 대한 문항 선택순서, 보기 선택순서, 클릭회수, 반응시간에 대한 평가 데이터를 수집하는 온라인 테스트부, 및 온라인 테스트부로부터 수집된 학습자의 온라인 테스트 평가 데이터를 분석하여 학습자의 학습수준과 학습능력, 성향을 평가하고 진단하여 보고하는 반응패턴 분석부를 포함한다. 제안하는 시스템은 보기 선택순서, 클릭회수, 반응시간을 학습자의 평가결과에 반영하여 효율적으로 학습자의 학습수준과 학습능력, 성향을 평가하고 진단할 수 있다.

• 경영정보학연구
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• 제3권2호
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• pp.289-303
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• 2001

최근 인터넷 사용인구의 폭발적인 증가에 발맞추어 인터넷을 이용한 온라인 증권의 시장규모 또한 빠른 속도로 커지고 있다. 그러나 이러한 시장의 팽창에도 불구하고 온라인 증권 서비스에 대한 평가기준이나 평가척도 개발은 아직 시장 성장속도에 휠씬 못 미치는 모습을 보이고 있다. 현재 많은 수의 온라인 증권 사이트들이 운영되고 있으며 정보통신의 발달과 더불어 온라인 증권시장은 향후에도 지속적인 증가세를 띨 것으로 예상된다. 온라인 증권사의 성공여부는 투자자들이 어떻게 이를 이용하고 평가를 내리느냐에 따라 판가름난다. 본 연구는 오프라인 서비스 제공업체에 대한 평가척도인 SERVQUAL과 그 외 기존의 온라인 서비스 평가기준들을 종합하는 한편, 이와 더불어 투자자들을 대상으로 한 실증연구를 통해 온라인 증권 서비스 품질에 대한 평가 측정도구를 개발 제시하고자 한다. 이 척도를 개발하는 과정에서 투자자들이 생각하는 온라인 증권 서비스의 중요 요소들을 밝히며, 나아가 이 척도가 인터넷 서비스, 특히 온라인 증권의 마케팅 전략수립에 어떻게 이용되어야 하는지 역시 논의한다.

• 공학교육연구
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• 제24권1호
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• pp.34-45
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• 2021

This research is a case study about "Critical Thinking and Debate Education" class which was done for freshmen at the engineering college of "S" Women's University. Real time remote classes through LMS and ZOOM were the most effective tools under on-line circumstances, considering the fact that video lectures only cannot cultivate students' capabilities of critical thinking and communication. Throughout the analysis on students' self-reflection journals and lecture evaluations, this paper examined considerable future points and the pros and cons of "Critical Thinking and Debate Education" under online presentation and discussion situation. As research outputs, students told they could feel less nervousness and anxiety when they exercise and have a presentation because they could choose familiar space for them. In addition, students also told that they feel comfortable about both self-feedback and peer evaluation, repeatedly seeing the recorded video clip. However, on the contrary, sometimes students felt uncomfortable due to unstable internet connection through the online classes, and they also were regretful about the missing chances of interaction between a teacher and students and of intimate exchanges among students. They also told they had felt a kind of limit of enhancing their presentation skills just in front of the monitor. Considering these outcomes, this research paper points out that online education needs to be proceeded by strengthening multi layered feedback to students with the build-up of a non-face-to-face stable educational infrastructure, application of online instructional strategy, and utilization of YouTube platform and video contents. Through this research paper, I hope the new system of encompassing on/off line "Critical Thinking and Debate Education" and effective teaching and learning method can be developed soon by strengthening the strength of online education.

• 한국전자거래학회지
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• 제6권3호
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• pp.127-148
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• 2001

As the Internet service is expanding rapidly, portal sites, a gateway tn the net, are attracting increasing attention these days. As the Internet service has expanded rapidly, so has the interest for portal sites,, which serve as a gateway to the net. Despite the tendency, however, research on a measure by which to evaluate the quality of portal sites or development of such measures has not been fully pursued. As online services, faced with profitability, are considering 'charge per view', the development of a set of quality evaluation measures for portal services will prove to become a valuable instrument in constructing competitive strategies that are vital for survival and growth of a firm. In that regard, this study aims to develop a set of evaluation measures for Internet portal sites by empirically investigating the most common offline measures for quality of services, SERVQUAL, retail SERVQUAL and other evaluation measures for IT-related online services. Moreover, the study offers the strategic implications of the defined measures.