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27th Annual CHI Conference on Human Factors in computing Systems

作者： Brumby, Duncan P. Salvucci, Dario D. Howes, Andrew UCL Interact Ctr London WC1E 6BT England

ISBN: (纸本)9781605582467

We investigate how people adapt their strategy for interleaving multiple concurrent tasks to varying objectives. A study was conducted in which participants drove a simulated vehicle and occasionally dialed a telephone number on a mobile phone. Experimental instructions and feedback encouraged participants to focus on either driving or dialing. Results show that participants adapted their task interleaving strategies to meet the required task objective, but in a manner that was nonetheless intricately shaped by internal psychological constraints. In particular, participants tended to steer in between dialing chunks of digits even when extreme vehicle drift implied that more reactive strategies would have generated better lane keeping. To better understand why drivers interleaved tasks at chunk boundaries, a modeling analysis was conducted to derive performance predictions for a range of dialing strategies. The analysis supported the idea that interleaving at chunk boundaries efficiently traded the time given up to dialing with the maintenance of a central lane position. We discuss the implications of this work in terms of contributions to understanding how cognitive constraints shape strategy adaptations in dynamic multitask environments.

关键词： Multitasking User and Cognitive models handheld devices and mobile computing Transport

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Predictors of Life Satisfaction based on Daily Activities from mobile Sensor Data 14

Predictors of Life Satisfaction based on Daily Activities fr...

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32nd Annual ACM Conference on Human Factors in computing Systems (CHI)

作者： Yuruten, Onur Zhang, Jiyong Pu, Pearl Ecole Polytech Fed Lausanne Human Comp Interact Grp Lausanne Switzerland Ecole Polytech Fed Lausanne AI Lab Lausanne Switzerland

ISBN: (纸本)9781450324731

In recent years much research work has been dedicated to detecting user activity patterns from sensor data such as location, movement and proximity. However, how daily activities are correlated to people's happiness (such as their satisfaction from work and social lives) is not well explored. In this work, we propose an approach to investigate the relationship between users' daily activity patterns and their life satisfaction level. From a well-known longitudinal dataset collected by mobile devices, we extract various activity features through location and proximity information, and compute the entropies of these data to capture the regularities of the behavioral patterns of the participants. We then perform component analysis and structural equation modeling to identify key behavior contributors to self-reported satisfaction scores. Our results show that our analytical procedure can identify meaningful assumptions of causality between activities and satisfaction. Particularly, keeping regularity in daily activities can significantly improve the life satisfaction.

关键词： Analysis Methods Ubiquitous computing / Smart Environments handheld devices and mobile computing

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Letras: An Architecture and Framework For Ubiquitous Pen-and-Paper Interaction

Letras: An Architecture and Framework For Ubiquitous Pen-and...

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2nd ACM SIGCHI Symposium on Engineering Interactive computing Systems

作者： Heinrichs, Felix Steimle, Juergen Schreiber, Daniel Muehlhaeuser, Max Tech Univ Darmstadt FG Telecooperat Dept Comp Sci D-64289 Darmstadt Germany

ISBN: (纸本)9781450300834

Paper remains a prevalent medium in mobile usage contexts due to its inherent flexibility and robustness. mobile computing solutions begin to provide powerful and convenient functionality, while the gap between paper documents and digital applications remains unbridged in mobile settings. Current toolkits do not offer adequate support for development of mobile pen-and-paper based applications, as they lack support for important mobile characteristics of real paper: user mobility and document mobility. To overcome their limitations, we present a novel generic architecture, along with its reference implementation Letras, a light-weight, freely available infrastructure to develop pen-and-paper based applications in mobile settings.

关键词： Development Tools / Toolkits / Programming Environments Pen and Tactile Input Ubiquitous computing / Smart Environments handheld devices and mobile computing Digital Pen Anoto

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Using Scent Actuation For Engaging User Experiences 12

Using Scent Actuation For Engaging User Experiences

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12th Advances in Computer Entertainment Technology Conference (ACE)

作者： Braun, Marius H. Cheok, Adrian D. City Univ London London England Imagineering Inst Iskandar Malaysia

ISBN: (纸本)9781450338523

The sense of smell (olfaction) has been recognised as an important factor governing our emotions and memory. Nevertheless, it remains the most underexplored sense and is still a relatively new modality in the domain of marketing. While researchers have begun to explore the merits of olfaction as a powerful trigger of memories, its relation with emotions has been largely disregarded and its interplay with other modalities remains largely unknown. In this paper, we explore the use of scent for mobile user experiences and devices with a hardware tele-smell device "Scentee". We provide two examples of how Scentee has successfully been used in marketing campaigns.

关键词： Emotion and Affective User Interface handheld devices and mobile computing Input and Interaction Technologies

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Effect of Motion-Gesture Recognizer Error Pattern on User Workload and Behavior 17

Effect of Motion-Gesture Recognizer Error Pattern on User Wo...

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22nd International Conference on Intelligent User Interfaces (IUI)

作者： Katsuragawa, Keiko Kamal, Ankit Lank, Edward Univ Waterloo Cheriton Sch Comp Sci Waterloo ON Canada Univ Lille Lille France

ISBN: (纸本)9781450343480

Bi-level thresholding is a motion gesture recognition technique that mediates between false positives, and false negatives by using two threshold levels: a tighter threshold that limits false positives and recognition errors, and a looser threshold that prevents repeated errors (false negatives) by analyzing movements in sequence. In this paper, we examine the effects of bi-level thresholding on the workload and acceptance of end-users. Using a wizard-of-Oz recognizer, we hold recognition rates constant and adjust for fixed versus bi-level thresholding. Given identical recognition rates, we show that systems using bi-level thresholding result in significant lower workload scores on the NASA-TLX and accelerometer variance. Overall, these results argue for the viability of bi-level thresholding as an effective technique for balancing between false positives, recognition errors and false negatives.

关键词： Usability Testing and Evaluation handheld devices and mobile computing Interaction Design Recognition Thresholding Gesture

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Capturing Indoor Scenes with Smartphones 12

Capturing Indoor Scenes with Smartphones

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25th Annual ACM Symposium on User Interface Software and Technology (UIST)

作者： Sankar, Aditya Seitz, Steven M. Univ Washington Seattle WA 98195 USA

ISBN: (纸本)9781450315807

In this paper, we present a novel smartphone application designed to easily capture, visualize and reconstruct homes, offices and other indoor scenes. Our application leverages data from smartphone sensors such as the camera, accelerometer, gyroscope and magnetometer to help model the indoor scene. The output of the system is two-fold;first, an interactive visual tour of the scene is generated in real time that allows the user to explore each room and transition between connected rooms. Second, with some basic interactive photogrammetric modeling the system generates a 2D floor plan and accompanying 3D model of the scene, under a Manhattan-world assumption. The approach does not require any specialized equipment or training and is able to produce accurate floor plans.

关键词： handheld devices and mobile computing Visualization Virtual Reality Augmented Reality

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Bi-Level Thresholding: Analyzing the Effect of Repeated Errors in Gesture Input

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ACM TRANSACTIONS ON INTERACTIVE INTELLIGENT SYSTEMS 2019年第2-3期9卷 15-15页

作者： Katsuragawa, Keiko Kamal, Ankit Liu, Qi Feng Negulescu, Matei Lank, Edward Univ Waterloo Cheriton Sch Comp Sci Natl Res Council Canada 200 Univ Ave W Waterloo ON N2L 3G1 Canada Univ Waterloo Waterloo ON Canada Univ Waterloo Cheriton Sch Comp Sci 200 Univ Ave W Waterloo ON N2L 3G1 Canada Univ Lille Lille France Bell Mobil 5099 Creekbank Rd Mississauga ON L4W 5N2 Canada Tubular Labs 153 Castro St 300 Mountain View CA 94041 USA Eventbrite 155 5th St7th Floor San Francisco CA 94103 USA

In gesture recognition, one challenge that researchers and developers face is the need for recognition strategies that mediate between false positives and false negatives. In this article, we examine bi-level thresholding, a recognition strategy that uses two thresholds: a tighter threshold limits false positives and recognition errors, and a looser threshold prevents repeated errors (false negatives) by analyzing movements in sequence. We first describe early observations that led to the development of the bi-level thresholding algorithm. Next, using a Wizard-of-Oz recognizer, we hold recognition rates constant and adjust for fixed versus bi-level thresholding;we show that systems using bi-level thresholding result in significantly lower workload scores on the NASA-TLX and significantly lower accelerometer variance when performing gesture input. Finally, we examine the effect that bi-level thresholding has on a real-world dataset of wrist and finger gestures, showing an ability to significantly improve measures of precision and recall. Overall, these results argue for the viability of bi-level thresholding as an effective technique for balancing between false positives, recognition errors, and false negatives.

关键词： Usability testing and evaluation handheld devices and mobile computing interaction design recognition thresholding gesture

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Intuitive or Idiomatic? An information-cognitive psychology study of child-tablet computer interaction

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Proceedings of the Association for Information Science and Technology 2015年第1期51卷 1-10页

作者： McEwen Rhonda N. Adam K. Dubé University of Toronto Mississauga 3359 Mississauga Rd. Mississauga ON L5L 1C6 Canada University of Toronto 140 St George St Toronto ON M5S 3G6 Canada

Using Luhmann's communication framework we examine the interaction implications that arise when kindergarten-grade 2 students use mathematics applications on four types of tablet computers. We asked a) what content is communicated between the child and the tablet computer, b) how is content communicated , c) how engaged are children in the tablet-child interaction, and d) what factors influence this engagement. We found that mathematics applications developers across the four platforms have focused on creating applications for the practice of a priori knowledge rather than on creating instructional applications. Also, the overall the emphasis in the applications studied was not to ‘gamify’ mathematics by providing entertainment but to offer a more traditional pedagogy, and that currently there is a low degree of diversity from developers in making use of the range of affordances of tablet computers. This communication studies-psychology interdisciplinary study offers a new conceptual approach to the study of child-tablet interaction.

关键词： Tactile and haptic user interfaces, Computer-Mediated Communication handheld devices and mobile computing Input and Interaction Technologies Children E-Learning and Education Interaction Design Multidisciplinary Design / Interdisciplinary Design

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Middle-out design 05

Middle-out design

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Proceedings of the 2005 conference on Designing for User eXperience

作者： Audrey Crane Dubberly Design Office San Francisco CA

ISBN: (纸本)9781595932501

In 2004, Dubberly Design Office (DDO) was contracted by "HandScript" to design a product that enables physicians to enter orders on a handheld ***' engineers had been working for a year on an alpha prototype and would continue development during the design of the beta. HandScripts' physicians were supplying content using a tool that mimicked an early interface for the product and enjoyed their roles as designers. The client had a limited budget and needed usability questions answered *** in many design projects, there was not time for a top-down or bottom-up design process. DDO had to work "middle-out".This case study describes how DDO borrowed the software quality assurance cycle and applied it to managing interaction design---resolving both large conceptual questions and detailed, screen-level questions. This "middle-out" approach used a familiar process to achieve fast, quality work.

关键词： usability research user-centered design / human-centered design user interface design health user experience analysis handheld devices and mobile computing design planning concept design product design process improvement interaction design health care

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Design of a neighborhood pathfinder 05

Design of a neighborhood pathfinder

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Proceedings of the 2005 conference on Designing for User eXperience

作者： Jeff Howard Jodi Forlizzi Carnegie Mellon University Pittsburgh PA

ISBN: (纸本)9781595932501

Everyone understands their city in a slightly different way. This project seeks to leverage these differences by allowing people to share their understandings and compile a visual social history of the *** wayfinding systems are designed around a process of discovery, of locating a known destination within the environment. A more subtle proposition is that of exploration, a progressive uncovering of the environment centered around the creation of one's own pathways. This project seeks to allow people to more readily grasp the potential for pathmaking within their environment. It allows them to collaboratively map their neighborhood through a network of geotagged cameraphone images documenting shared *** people add their own photos to the system, the shared image of the city grows and reflects new connections. Encouraged to explore, even lifelong residents may begin to see their home with a greater sense of depth and understanding.

关键词： handheld devices and mobile computing wayfinding context-aware computing interaction design user research GPS prototyping

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