294 research outputs found
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Experiences in involving analysts in visualisation design
Involving analysts in visualisation design has obvious benefits, but the knowledge-gap between domain experts ("analysts") and visualisation designers ("designers") often makes the degree of their involvement fall short of that aspired. By promoting a culture of mutual learning, understanding and contribution between both analysts and designers from the outset, participants can be raised to a level at which all can usefully contribute to both requirement definition and design. We describe the process we use to do this for tightly-scoped and short design exercises -- with meetings/workshops, iterative bursts of design/prototyping over relatively short periods of time, and workplace-based evaluation -- illustrating this with examples of our own experience from recent work with bird ecologists
On Regulatory and Organizational Constraints in Visualization Design and Evaluation
Problem-based visualization research provides explicit guidance toward
identifying and designing for the needs of users, but absent is more concrete
guidance toward factors external to a user's needs that also have implications
for visualization design and evaluation. This lack of more explicit guidance
can leave visualization researchers and practitioners vulnerable to unforeseen
constraints beyond the user's needs that can affect the validity of
evaluations, or even lead to the premature termination of a project. Here we
explore two types of external constraints in depth, regulatory and
organizational constraints, and describe how these constraints impact
visualization design and evaluation. By borrowing from techniques in software
development, project management, and visualization research we recommend
strategies for identifying, mitigating, and evaluating these external
constraints through a design study methodology. Finally, we present an
application of those recommendations in a healthcare case study. We argue that
by explicitly incorporating external constraints into visualization design and
evaluation, researchers and practitioners can improve the utility and validity
of their visualization solution and improve the likelihood of successful
collaborations with industries where external constraints are more present.Comment: 9 pages, 2 figures, presented at BELIV workshop associated with IEEE
VIS 201
Evaluating the relationship between user interaction and financial visual analysis
It has been widely accepted that interactive visualization techniques enable users to more effectively form hypotheses and identify areas for more detailed investigation. There have been numerous empirical user studies testing the effectiveness of specific visual analytical tools. However, there has been limited effort in connecting a user’s interaction with his reasoning for the purpose of extracting the relationship between the two. In this paper, we present an approach for capturing and analyzing user interactions in a financial visual analytical tool and describe an exploratory user study that examines these interaction strategies. To achieve this goal, we created two visual tools to analyze raw interaction data captured during the user session. The results of this study demonstrate one possible strategy for understanding the relationship between interaction and reasoning both operationally and strategically. Index Terms: H.5.2 [Information Interfaces And Presentatio
The Validity, Generalizability and Feasibility of Summative Evaluation Methods in Visual Analytics
Many evaluation methods have been used to assess the usefulness of Visual
Analytics (VA) solutions. These methods stem from a variety of origins with
different assumptions and goals, which cause confusion about their proofing
capabilities. Moreover, the lack of discussion about the evaluation processes
may limit our potential to develop new evaluation methods specialized for VA.
In this paper, we present an analysis of evaluation methods that have been used
to summatively evaluate VA solutions. We provide a survey and taxonomy of the
evaluation methods that have appeared in the VAST literature in the past two
years. We then analyze these methods in terms of validity and generalizability
of their findings, as well as the feasibility of using them. We propose a new
metric called summative quality to compare evaluation methods according to
their ability to prove usefulness, and make recommendations for selecting
evaluation methods based on their summative quality in the VA domain.Comment: IEEE VIS (VAST) 201
Design by immersion: A transdisciplinary approach to problem-driven visualizations
While previous work exists on how to conduct and disseminate insights from problem-driven visualization work and design studies, the literature does not address how to accomplish these goals in transdisciplinary teams in ways that advance all disciplines involved. In this paper we introduce and define a new methodological paradigm we call design by immersion, which provides an alternative perspective on problem-driven visualization work. Design by immersion embeds transdisciplinary experiences at the center of the visualization process by having visualization researchers participate in the work of the target domain (or domain experts participate in visualization research). Based on our own combined experiences of working on cross-disciplinary, problem-driven visualization projects, we present six case studies that expose the opportunities that design by immersion enables, including (1) exploring new domain-inspired visualization design spaces, (2) enriching domain understanding through personal experiences, and (3) building strong transdisciplinary relationships. Furthermore, we illustrate how the process of design by immersion opens up a diverse set of design activities that can be combined in different ways depending on the type of collaboration, project, and goals. Finally, we discuss the challenges and potential pitfalls of design by immersion
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Understanding geovisualization users and their requirements: a user-centred approach
Visualization Psychology for Eye Tracking Evaluation
Technical progress in hardware and software enables us to record gaze data in
everyday situations and over long time spans. Among a multitude of research
opportunities, this technology enables visualization researchers to catch a
glimpse behind performance measures and into the perceptual and cognitive
processes of people using visualization techniques. The majority of eye
tracking studies performed for visualization research is limited to the
analysis of gaze distributions and aggregated statistics, thus only covering a
small portion of insights that can be derived from gaze data. We argue that
incorporating theories and methodology from psychology and cognitive science
will benefit the design and evaluation of eye tracking experiments for
visualization. This book chapter provides an overview of how eye tracking can
be used in a variety of study designs. Further, we discuss the potential merits
of cognitive models for the evaluation of visualizations. We exemplify these
concepts on two scenarios, each focusing on a different eye tracking study.
Lastly, we identify several call for actions
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