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7th International AAAI Conference on Weblogs and Social Media, ICWSM 2013

作者： Lee, Tak Yeon Dugan, Casey Geyer, Werner Ratchford, Tristan Rasmussen, Jamie Shami, N. Sadat Lupushor, Stela Human-Computer Interaction Lab. Computer Science Dept. University of Maryland College Park MD 20742 United States IBM T.J. Watson Research Cambridge MA United States IBM Armonk NY United States

ISBN: (纸本)9781577356103

This paper examines the relationship between motivational design and its longitudinal effects on crowdsourcing systems. In the context of a company internal web site that crowdsources the identification of Twitter accounts owned by company employees, we designed and investigated the effects of various motivational features including individual / social achievements and gamification. Our 6-month experiment with 437 users allowed us to compare the features in terms of both quantity and quality of the work produced by participants over time. While we found that gamification can increase workers' motivation overall, the combination of motivational features also matters. Specifically, gamified social achievement is the best performing design over a longer period of time. Mixing individual and social achievements turns out to be less effective and can even encourage users to game the system. Copyright © 2013, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

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Usability of car dashboard displays for elder drivers 11

Usability of car dashboard displays for elder drivers

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Proceedings of the SIGCHI Conference on human Factors in Computing Systems

作者： Kim, SeungJun Dey, Anind K. Lee, Joonhwan Forlizzi, Jodi Human-Computer Interaction Institute Pittsburgh PA 15213 United States School of Design Carnegie Mellon University Pittsburgh PA 15213 United States Neowiz Lab. Seoul Korea Republic of

ISBN: (纸本)9781450302289

The elder population is rising worldwide;in the US, no longer being able to drive is a significant marker of loss of independence. One of the approaches to helping elders drive more safely is to investigate the use of automotive user interface technology, and specifically, to explore the instrument panel (IP) display design to help attract and manage attention and make information easier to interpret. In this paper, we explore the premise that dashboard displays can be better designed to support elder drivers, their information needs, and their cognitive capabilities. We conducted a study to understand which display design features are critically linked to issues of divided attention and driving performance. We found that contrast of size and reduced clutter are instrumental in enhancing driving performance, particularly for the elder population. Surprisingly, our results showed that color elements have a negative effect on driving performance for elders, while color elements and fills slightly improve performance. We conclude with design implications generated from this work. Copyright 2011 ACM.

关键词： Eye tracking

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Icon abacus: Positional display of document attributes

Icon abacus: Positional display of document attributes

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5th ACM/IEEE Joint Conference on Digital Libraries - Digital Libraries: Cyberinfrastructure for Research and Education

作者： Bier, Eric A. Perer, Adam Palo Alto Research Center Inc. 3333 Coyote Hill Road Palo Alto CA 94304 Human-Computer Interaction Lab. University of Maryland College Park MD 20742

This paper presents icon abacus, a space-efficient technique for displaying document attributes by automatic positioning of document icons. It displays the value of an attribute by using position on a single axis, allowing the other axis to display different metadata simultaneously The layout is stable enough to support navigation using spatial memory. Copyright 2005 ACM.

关键词： Digital libraries

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The GOMS SIG: Troubleshooting, lessons learned, novel applications, teaching techniques, & future research

The GOMS SIG: Troubleshooting, lessons learned, novel applic...

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Conference on human Factors in Computing Systems, CHI EA 1999

作者： Gray, Wayne D. John, Bonnie E. Kieras, David E. Boehm-Davis, Deborah A. Human Factors and Applied Cognition George Mason University United States Human-Computer Interaction Institute Carnegie Mellon University United States Artificial Intelligence Lab. EECS Dept. University of Michigan United States

GOMS is many things to many people. It is the only validated analytic usability evaluation method (UEM) in the field of human-computer interaction. It is being used by practitioners at some of the world's largest and some of the smallest software companies. It is a research agenda that is being pursued at universities the world over. It is a task analysis technique with roots in both cognitive psychology and artificial intelligence. It is a flexible tool that can be used with protocol analysis. It is a technique that makes detailed profiling possible. It is an important adjunct to usability testing. It is something that can be done at the early stages of the design process. It is a way of intelligently playing what if games with interface possibilities. It is all of these things and more.

关键词： Usability engineering

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Bridging languages in social networks: How multilingual users of Twitter connect language communities?

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Proceedings of the ASIST Annual Meeting 2012年第1期49卷 1-4页

作者： Eleta, Irene Golbeck, Jennifer College of Information Studies University of Maryland College Park MD 20742 United States Human-Computer Interaction Lab. College of Information Studies University of Maryland College Park MD 20742 United States

Multilingual users of social media and social networking sites are invisible -even unconscious- translators. Their language skills and multicultural background could help diminish the segmentation of information spheres online by connecting different language communities. Focusing on the microblogging site Twitter, this study aims at defining and classifying language bridges by looking at the languages and structure of the social networks of multilingual individuals. The social network analysis unveils four types of structures, one of which is defined as a language bridge. The next step of this work in progress aims at providing quantitative measures of this phenomenon, which has not been yet properly described or understood.

关键词： computermediated communication Information networks Language bridges Microblogging Microblogs Multilingual communication Networked languages Social media Social network analysis Social networks Twitter

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Exploring playful experiences in social network games

Exploring playful experiences in social network games

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2015 Digital Games Research Association International Conference, DiGRA 2015

作者： Paavilainen, Janne Koskinen, Elina Korhonen, Hannu Alha, Kati University of Tampere Game Research Lab. Kanslerinrinne 1 TampereFI-33014 Finland University of Tampere Tampere Unit for Computer-Human Interaction Kanslerinrinne 1 TampereFI-33014 Finland

Social network games are popular pastime for millions of players on Facebook. Despite their popularity, qualitative research on experiences in these games has been scarce. In our study, 110 informants played 23 games on Facebook and reported their experiences using the Playful Experiences (PLEX) framework. We analyzed 110 reports containing 330 PLEX descriptions and present findings from three perspectives. First, we provide an overall analysis on playful experiences in social network games. Then we focus on genrespecific experiences in casual puzzle, casual simulation, and mid-core strategy games. Lastly, we provide examples of interesting outlier experiences. Based on our study, Competition, Completion and Challenge are the most common playful experiences in these games. The genre-specific analysis revealed both similarities and differences between the genres, while the outlier experiences provide new perspectives on social network games. Through the PLEX framework, this research helps to understand the playful experiences in social network games. © 2015 Authors & Digital Games Research Association DiGRA.

关键词： Social networking (online)

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Adaptive encoding of fixed codebook in CELP coders

Adaptive encoding of fixed codebook in CELP coders

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1998 23rd IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 1998

作者： Kim, Hong Kook Human and Computer Interaction Lab. Information Processing Sector Samsung Advanced Institute of Technology San 14 Nongseo-Ri Kiheung-Eup Yongin-City Kyungki-Do 449-712 Korea Republic of

ISBN: (纸本)0780344286

We propose an adaptive encoding method of fixed codebook in CELP coders and implement an adaptive fixed code excited linear prediction (AF-CELP) speech coder. The AF-CELP exploits the fact that the fixed codebook contribution to the speech signal is also periodic as the adaptive codebook (or pitch filter) contribution. By modeling the fixed codebook with the pitch lag and the gain from the adaptive codebook, the AF-CELP can be implemented at low bit rates as well as low complexity. Listening tests show that a 6.4 kbit/s AF-CELP has a comparable quality to the 8 kbit/s CS-ACELP. © 1998 IEEE.

关键词： Signal encoding

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Detection Thresholds for Vertical Gains in VR and Drone-based Telepresence Systems

Detection Thresholds for Vertical Gains in VR and Drone-base...

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IEEE Annual International Symposium Virtual Reality

作者： Keigo Matsumoto Eike Langbehn Takuji Narumi Frank Steinicke Cyber Interface Lab. The University of Tokyo Human-Computer Interaction University of Hamburg

ISBN: (数字)9781728156088

ISBN: (纸本)9781728156095

Several redirected walking techniques have been introduced and analyzed in recent years, while the main focus was on manipulations in horizontal directions, in particular, by means of curvature, rotation, and translation gains. However, less research has been conducted on the manipulation of vertical movements and its possible use as a redirection technique. Actually, vertical movements are fundamentally important, e.g., for remotely steering a drone using a virtual reality *** this paper, we explored vertical gains, a novel redirection technique, which enables us to purposefully manipulate the mapping of the user’s physical vertical movements to movements in the virtual space and the remote space. This approach allows natural and more active physical control of a real drone. To demonstrate the usability of vertical gains, we implemented a telepresence drone and vertical redirection techniques for stretching and crouching actions using common VR devices. We conducted two user studies to investigate the effective manipulation ranges and its usability: one study using a virtual environment (VE), and one using a camera stream from a telepresence drone. The results revealed that our technique could manipulate a users vertical movement without her/his noticing.

关键词： Drones Telepresence Legged locomotion Resists Virtual reality Aerospace electronics Three-dimensional displays

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Investigating the Effects of Real-time Student Monitoring Interface on Instructors’ Monitoring Practices in Online Teaching 24

Investigating the Effects of Real-time Student Monitoring In...

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Proceedings of the CHI Conference on human Factors in Computing Systems

作者： Ha Yeon Lee Seora Park Esther Hehsun Kim Jiyeon Seo Hajin Lim Joonhwan Lee Human-Computer Interaction+Design Lab. Seoul National University Korea Republic of Human-Computer Interaction+Design Lab Seoul National University Korea Republic of

ISBN: (纸本)9798400703300

The shift to online education, accelerated by the COVID-19 pandemic, has introduced challenges in monitoring student engagement, an essential aspect of effective teaching. In response, real-time student monitoring interfaces have emerged as potential tools to aid instructors, yet their efficacy has not been thoroughly examined. Addressing this gap, we conducted a controlled experiment with 20 instructors examining the impact of engagement cues (presence versus absence) and student engagement levels (high versus low) on instructors’ monitoring effectiveness, teaching behavior adjustments, and cognitive load in online classes. Our findings underscored the fundamental benefits of student engagement monitoring interfaces for improving monitoring quality and effectiveness. Furthermore, our study highlighted the critical need for customizable interfaces that could balance the informational utility of engagement cues with the associated cognitive load and psychological stress on instructors. These insights may offer design implications for the design of future student engagement monitoring interfaces.

关键词： Real-time student monitoring system monitoring online learning online teaching student engagement

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Music genre/mood classification using a feature-based modulation spectrum

Music genre/mood classification using a feature-based modula...

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2011 International Conference on Mobile IT-Convergence, ICMIC 2011

作者： Lim, Shin-Cheol Jang, Sei-Jin Lee, Soek-Pil Kim, Moo Young Human Computer Interaction Lab. Dept. Information Communication Engineering Sejong University Seoul Korea Republic of Digital Media Research Center Korea Electronics Technology Institute Seoul Korea Republic of

ISBN: (纸本)9788988678602

The feature-based modulation flatness measure (FMSFM) and feature-based modulation crest measure (FMSCM) are proposed as novel feature vectors for music genre and mood classification. These features are extracted using a feature-based modulation spectrum to represent time-varying characteristics of the music signal. Instead of the spectrogram of the signal, timbral features such as mel-frequency cepstral coefficient (MFCC), decorrelated filter bank (DFB), and octave-based spectral contrast (OSC) are used for modulation. Combining FMSFM and FMSCM with the timbral features, we obtain significantly better accuracy in genre and mood classification than the conventional features. © 2011 AICIT.

关键词： Modulation

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