Although many virtual environment (VE) technologies such as the four-screen CAVE™ are described as immersive, users can still perceive distractions from the real world. This exposure to real-world distraction may redu...
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ISBN:
(纸本)1595933212
Although many virtual environment (VE) technologies such as the four-screen CAVE™ are described as immersive, users can still perceive distractions from the real world. This exposure to real-world distraction may reduce users' sense of presence, and if presence is correlated with performance as some have claimed, the real-world distractions may also hinder performance. Thus, VE designers may want to consider ways to reduce real-world distraction. This paper presents an experiment to investigate the effect of reduced visual stimulus in the peripheral area on user performance and the usability of an immersive VE. We carefully designed three tasks that cause different levels of awareness of the real-world distraction. Using these tasks, we evaluated users' performance and preference in two conditions. The low-stimulus condition was created by hanging a black cloth across the missing back wall of a CAVE. The high-stimulus condition was created by projected animations and real human motion outside the CAVE. The experiments show that reduced distraction may have a positive or negative effect on user performance, depending on the specific tasks and environments. Copyright 2006 ACM.
The interdisciplinary nature of system design can lead to communication problems between developers in different fields. This is becoming evident in the emerging field of agile software development which has largely i...
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ISBN:
(纸本)1595932984
The interdisciplinary nature of system design can lead to communication problems between developers in different fields. This is becoming evident in the emerging field of agile software development which has largely ignored or been unable to address usability. This work presents a development process and toolset that draws on extreme programming - an agile software development process, and scenario-based design - a usability engineering process. This approach will allow developers in both fields to better communicate and work together to efficiently design usable systems.
After an historical review of evaluation methods, we describe an emerging research method called Multi-dimensional In-depth Long-term Case studies (MILCs) which seems well adapted to study the creative activities that...
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ISBN:
(纸本)1595935622
After an historical review of evaluation methods, we describe an emerging research method called Multi-dimensional In-depth Long-term Case studies (MILCs) which seems well adapted to study the creative activities that users of information visualization systems engage in. We propose that the efficacy of tools can be assessed by documenting 1) usage (observations, interviews, surveys, logging etc.) and 2) expert users' success in achieving their professional goals. We summarize lessons from related ethnography methods used in HCI and provide guidelines for conducting MILCs for information visualization. We suggest ways to refine the methods for MILCs in modest sized projects and then envision ambitious projects with 3-10 researchers working over 1-3 years to understand individual and organizational use of information visualization by domain experts working at the frontiers of knowledge in their fields. Copyright 2006 ACM.
Recent research has shown that developers spend significant amounts of time navigating around code. Much of this time is spent on redundant navigations to code that the developer previously found. This is necessary to...
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In this position paper, we argue that in the context of a user's interaction with multiple platforms, consistency must be supported along with support for user's task migration. We believe that the user should...
Color is one of the most important low-level features used in image analysis and retrieval. In this paper we introduce an algorithm for extracting compact color feature in the CIELAB color space. Our method is based o...
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ISBN:
(纸本)9781932415957
Color is one of the most important low-level features used in image analysis and retrieval. In this paper we introduce an algorithm for extracting compact color feature in the CIELAB color space. Our method is based on an ant colony clustering algorithm, which helps us develop a perceptually based image similarity metric. We propose a dominant color and area percentage model, which provides a very compact color feature representation of images. Besides image similarity metric is developed based on dominant colors matching. The algorithm introduced in this paper is well suited for creating small color descriptors and is efficient. It is suitable for image representation, matching and retrieval. It also has some important advantages for content-based image retrieval system, such as great reduction of the feature file sizes needed for storage and indexing.
We present Vizability, a usability engineering tool that is motivated by the variability of analysis processes and facilitates the analysis of existing problem data with the goal of process improvement. Usability engi...
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ISBN:
(纸本)1595933158
We present Vizability, a usability engineering tool that is motivated by the variability of analysis processes and facilitates the analysis of existing problem data with the goal of process improvement. Usability engineers spend considerable resources performing usability testing and analyzing the resulting data, but their work is often limited to a single development effort or a small set of similar efforts. To extend the analysis process to multiple diverse efforts, it is necessary to categorize and store data in a consistent manner and have techniques for discovering patterns in that data. Our tool is designed to work with problem data that has been organized according to a hierarchical framework of usability concepts, which ensures consistency through completeness and precision. In addition, our tool helps engineers discover weaknesses in their process through exploratory browsing of a visualization of the tree structure and visual filtering based on cost, importance, and keywords. Copyright 2006 ACM.
Reusing HCI design knowledge shows potential in allowing practitioners to design based on previously identified concerns. A reuse approach is presented that is based on claims, design knowledge units encapsulating tra...
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ISBN:
(纸本)1595933417
Reusing HCI design knowledge shows potential in allowing practitioners to design based on previously identified concerns. A reuse approach is presented that is based on claims, design knowledge units encapsulating tradeoffs. Fundamental characteristics of reuse include abstraction, selection, specification, and integration. Claim relationships provide the key to instantiating each of these traits within the claims reuse approach. A claims library is used implement a working model of the reuse process. Studies analyzing various components of this work validate existing efforts and provide impetus for future work. Copyright is held by the author/owner(s).
computer displays can be helpful for making users aware of the remote presence of friends and family. In many of the research projects that have explored the use of novel displays, the real goal is to improve a user&#...
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ISBN:
(纸本)1595931783
computer displays can be helpful for making users aware of the remote presence of friends and family. In many of the research projects that have explored the use of novel displays, the real goal is to improve a user's sense of connectedness to those remote loved ones. However, very few have leveraged a user-centered design process or empirically studied the effects of using a display on users' sense of awareness and connectedness. In this paper, we present our multi-phase, user-centered design process for building displays that support awareness and connectedness: Presence Displays, which are physical, peripheral awareness displays of online presence of close friends or family. We present evidence, from a 5-week long field study, that these displays provide significantly better awareness of and connectedness to a loved one, than a traditional graphical display of online presence. Copyright 2006 ACM.
TreePlus is a graph browsing technique based on a tree-style layout. It shows the missing graph structure using interaction techniques and enables users to start with a specific node and incrementally explore the loca...
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