Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems最新文献_第5页

#PraCegoVer # PraCegoVer

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426489

Carolina Q. Sacramento, Leonardo Nardi, S. Ferreira, João Marcelo dos Santos Marques

{"title":"#PraCegoVer","authors":"Carolina Q. Sacramento, Leonardo Nardi, S. Ferreira, João Marcelo dos Santos Marques","doi":"10.1145/3424953.3426489","DOIUrl":"https://doi.org/10.1145/3424953.3426489","url":null,"abstract":"Visual content is strongly present in online social media. To ensure the accessibility of these contents to screen reader users, it is necessary to provide alternatives. In this paper, we report an initial investigation about the practices of visual content description in Brazilian online social media by examining the interfaces of the four most used in the country (YouTube, Facebook, WhatsApp, and Instagram) and surveying the description habits adopted by sighted users and the difficulties faced by screen readers users in understanding visual content. For this purpose, we conducted online surveys with sighted and visually impaired social media users. The results showed, among other aspects, that most sighted users do not describe visual content and even those that describe it, have difficulties to create the alternatives, mainly because they don't know what should be included or how to elaborate them. Moreover, for screen reader users, the greatest difficulty is the lack of alternatives for visual content provided by people. From the results, were identified actions and improvements to be adopted in the interfaces of online social media, in order to make them more inclusive to the Brazilian visually impaired.","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117323158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Comparing users' perception of different chatbot interaction paradigms: a case study 比较用户对不同聊天机器人交互模式的感知:一个案例研究

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426501

Francisco A. M. Valério, T. G. Guimarães, R. Prates, Heloisa Candello

引用次数: 4

Design characteristics to stimulate technological appropriation and student-centered design in a VLEs context 在VLEs环境中激发技术挪用和以学生为中心的设计特征

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426634

Márcia Cardoso, M. Silveira

{"title":"Design characteristics to stimulate technological appropriation and student-centered design in a VLEs context","authors":"Márcia Cardoso, M. Silveira","doi":"10.1145/3424953.3426634","DOIUrl":"https://doi.org/10.1145/3424953.3426634","url":null,"abstract":"Due to the constant need for improvement in the quality of education, there has been a growing interest in technological tools to support design for teaching and learning in a student-centered way. As a result, the development of these tools has increased. However, it is not clear what shapes teachers' design decisions and how tools can best support their design processes. Also, researches on Virtual Learning Environments (VLEs) have shown that teachers usually do not explore VLEs to their full potential and only adopt a limited set of available tools. To gain an understanding of this subject, we conducted a systematic review to understand the tools used in education and we ran an online survey with teachers to learn more about the tools they used, why they chose them, and what strengths and weaknesses they found on these tools. That leads us to the primary goal of the present work, which is to explore the VLEs and understand how they can foster technology appropriation and learning design in a student-centered way. Furthermore, a semiotic inspection was performed on the VLEs subject of this study (Moodle and Google Classroom) to analyze the quality of metacommunication between the applications' designers and the end-users (teachers). Having done that, it was possible to sort out a list of characteristics for the VLEs, aimed to improve appropriation and suit better student-centered design. We hope this work could help to bring (a) clarity about how to boost teacher's appropriation for future tools and (b) better student outcomes via appropriation and learning design knowledge from (a).","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124171859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Systemic view of human-data interaction: analyzing a COVID-19 data visualization platform 人-数据交互的系统视图:分析COVID-19数据可视化平台

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426655

Bernardo Ferrari, D. P. S. Junior, R. Pereira

引用次数: 2

Does this persona represent me?: investigating an approach for automatic generation of personas based on questionnaires and clustering 这个角色代表我吗?研究一种基于问卷调查和聚类的自动生成人物角色的方法

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426648

K. D. S. C. Branco, Rhenara A. Oliveira, Francisco L. Q. da Silva, J. Rabelo, A. B. Marques

{"title":"Does this persona represent me?: investigating an approach for automatic generation of personas based on questionnaires and clustering","authors":"K. D. S. C. Branco, Rhenara A. Oliveira, Francisco L. Q. da Silva, J. Rabelo, A. B. Marques","doi":"10.1145/3424953.3426648","DOIUrl":"https://doi.org/10.1145/3424953.3426648","url":null,"abstract":"Personas are fictional representations of an end user based on data collected from a specific target audience. The creation of personas takes time, because part of the process is manual, which causes difficulties during the stages of data generation and analysis, if the data sample is large. The present work aims to investigate the results of the automatic generation of personas through a questionnaire and the Clustering method. Initially, a questionnaire was applied in order to outline the profile of students in the Computer Science and Software Engineering courses at the university Federal of Ceará. 130 responses were obtained from this applied questionnaire. The automatic generation of personas used the collected responses as a database, these data were applied to the Clustering method. From Clustering, using a specific tool for this purpose, it was possible to generate four personas automatically. In relation to the data generated from the personas, it was possible to identify some characteristics, such as: (a) course choice factor: the opportunity to work with new technologies, influence of family and friends and the possibility of living abroad; (b) factor of withdrawal from the course: lack of identification with the course, learning difficulties in the disciplines and finance; and, (c) area of interest: software engineering, human-computer interaction and computer graphics. A new questionnaire was applied in order to validate the personas generated in relation to credibility, empathy and similarity. Based on the results obtained, it was observed that two of the four personas generated achieved greater prominence in relation to the validation criteria, showing that the personas look like real people, students think like the personas and share similar interests.","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117085587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Data visualization on focus: exploring communicability of dashboards generated from BI tools 关注数据可视化:探索由BI工具生成的仪表板的可沟通性

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426544

F. Nunes, C. Correa, Alessandra Jandrey, Allan Barcelos, Daniel Reyes, Matheus Bernardes, Afonso Sales, M. Silveira

{"title":"Data visualization on focus: exploring communicability of dashboards generated from BI tools","authors":"F. Nunes, C. Correa, Alessandra Jandrey, Allan Barcelos, Daniel Reyes, Matheus Bernardes, Afonso Sales, M. Silveira","doi":"10.1145/3424953.3426544","DOIUrl":"https://doi.org/10.1145/3424953.3426544","url":null,"abstract":"Technological evolution has led to the development of an increasingly connected society, in which the volume and variety of data generated grow constantly. In this context, data visualization becomes a challenge, since it has the potential to facilitate users' understanding of the analyzed data. Nowadays, there are several tools to support the construction of visualizations, each one offering resources for the construction of dashboards from a set of data. Considering this scenario and based on the application of semiotic inspection and communicability assessment methods, this study presents an analysis of three visualization tools available on the market (Tableau, Power BI and Zoho Analytics), in order to understand the interaction of users with the developed visualizations and to identify possible existing communicability problems. We used the 2010 Brazilian Census data to build dashboards in these three tools as a method of validating our study. The results show a greater number of communication disruptions in the interaction with Tableau and Power BI in relation to Zoho Analytics, indicating that Zoho Analytics allows the user a greater understanding of the result of the actions taken.","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121827638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

ChartVision ChartVision

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426644

Cynthya Letícia Teles de Oliveira, Alan Trindade de Almeida Silva, Jefferson Magalhães de Morais, M. Mota

引用次数: 1

Influence of environmental conditions in the performance of open-source software for facial expression recognition 环境条件对人脸表情识别开源软件性能的影响

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426630

R. V. Aranha, André Biondi Casaes, Fátima L. S. Nunes

{"title":"Influence of environmental conditions in the performance of open-source software for facial expression recognition","authors":"R. V. Aranha, André Biondi Casaes, Fátima L. S. Nunes","doi":"10.1145/3424953.3426630","DOIUrl":"https://doi.org/10.1145/3424953.3426630","url":null,"abstract":"The automatic and real-time recognition of the user's emotional state is a feature that can provide benefits for different areas of Human-Computer Interaction. The scientific literature presents several techniques that can be used to recognize the user's emotional state. However, many techniques involve the use of sensors that can result in financial costs and cause discomfort to the user. In this scenario, the recognition of the emotional state through the analysis of facial expressions presents itself as a useful and practical approach, since it does not involve the use of sensors attached to the user's body and executed in different types of devices. Despite these advantages, software that allow the analysis of facial expressions for free are still incipient, and performance evaluation of this type of software usually is not available. In order to contribute to this context and assist researchers who need this type of software, this study presents a comparative analysis of two open-source emotion recognition software (\"CLMTrackr\" and \"Face-api.js\") simulating different environmental conditions related to lighting and distance. Considering images from two datasets, we generate 8675 videos simulating 25 different environmental conditions. Our results indicate that the environmental conditions did not cause major impacts on the accuracy of the software, and CLMTrackr and Face-api.js, presented, respectively, 28% and 64% of average accuracy.","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131721485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Vis2Learning

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426627

Maylon Pires Macedo, R. Paiva, I. Gasparini, L. Zaina

{"title":"Vis2Learning","authors":"Maylon Pires Macedo, R. Paiva, I. Gasparini, L. Zaina","doi":"10.1145/3424953.3426627","DOIUrl":"https://doi.org/10.1145/3424953.3426627","url":null,"abstract":"Information Visualization concerns efforts on creating better solutions to represent data in visual formats and consequently support the user interpretation on it. The literature has shown that there is a gap in the development of educational data visualizations which fulfill end-user needs. This paper presents Vis2Learning a guide of recommendations to support the building of visualizations applied to educational data in e-learning context. Vis2Learning provides a set of scenarios from which educational data visualizations can be developed. Each scenario comprises (i) a visual format of visualization and its characteristics; (ii) examples of how to use it; and (iii) overall recommendations to enhance the user's understanding on the data. We carried out an online questionnaire from which 34 end-users (Brazilian teachers) evaluated visualizations which were constructed by using the guide. The results reveal that the recommendations made the visualizations suitable to be applied in the e-learning context. However, our findings showed that the participants who did not have a former contact with visualizations in e-learning context struggled to understand some visual formats which are not well-known by the audience.","PeriodicalId":102113,"journal":{"name":"Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems","volume":"R-27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126630194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Evaluation of Facebook advertising recommendations explanations with the perspective of semiotic engineering 基于符号学工程的Facebook广告推荐解释评价

Proceedings of the 19th Brazilian Symposium on Human Factors in Computing Systems Pub Date : 2020-10-26 DOI: 10.1145/3424953.3426632

N. D. O. Carvalho, A. L. Sampaio, I. Monteiro

引用次数: 0