Transcript INFOVIZ_PRESENTATION.pptx

How do People Make Sense of Unfamiliar
Visualizations?: A Grounded Model of Novice’s
Information Visualization Sensemaking
Authors: Sukwon Lee, Sung-Hee Kim, Ya-Hsin Hung, Heidi Lam, Youn-ah Kang, and Ji Soo Yi
Venue: InfoVis
Year of publication: 2015
CS725/825 – Information Visualization
Presented by Mridul Sen
Date: 02/03/2016
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Introduction
 Making sense of unfamiliar visualization
 Evaluation has been done to find the sensemaking
activities of novice people on encountering unfamiliar visualization
 Researchers used ground theory method on the data
 NOVIS model has been created as a result
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Background
 Few studies on interaction between novice users and visualization
 Graph comprehension
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Graph formats
Visual characteristics
Knowledge about graphs
Knowledge about contents
 Existing models
• Notional model of analysts sensemaking loop
• Data/frame theory of sensemaking
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Methods
 Visualizations
• Parallel- coordinate plot
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Methods
 Visualizations
• Chord Diagram
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Methods
 Visualizations
• Treemap
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Methods
 Participants
• 13 participants
• Participants were selected from a university and had basic computer skills
• All of the participants were native English speakers
• One hour of participation
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Procedure
 Two practice sessions were organized to familiarize the participants
with the think aloud method
 Visualizations from 13 out of 39 sessions were showed to participants
 Data prescreening was performed
 Five sessions were removed based on the result
 Three observation sessions and one semi structured interview was
conducted
 Qualitative inquiry approach for data triangulation
 Grounded theory applied to data
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NOVIS model (Novice’s Information Visualization
Sensemaking )
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Dynamics of NOVIS model
Image courtesy: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7192668
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Why, What and How framework
 What? – One multidimensional dataset, One network dataset and one tree
dataset.
 Why? –
• Actions
Analyze
o Consume (Discover)
o Produce(Record, Derive)
Query
o Compare
• Targets
Attributes
o Correlation
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Why, What and How framework
 How?• Manipulate
o Navigate
• Reduce
o Filter
• Encoding- Dynamics of activities
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Validation analysis
 Domain validation- Involving semistructured interview for domain
situation assessment
 Abstraction validation-Observing and documenting participants
quotes
 Idiom validation-Measuring participant’s performance on unfamiliar
visualization
 Algorithm validation-Clear demonstration of sensemaking activities in
the NOVIS model compared to other existing models
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Challenges and Limitations
 Challenges
 Incorrect and failed frames
 Problem in exploring the visualization
 Limitations
• Missing thought processes due to think aloud method
• Limited number of types of information visualization used
• Unrealistic experimental setting
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Future Research Directions
 Application of other presentation strategies to construct a correct
frame
 Effective visualization sensemaking
 Expansion of sensemaking activities
 Expert’s understanding of unfamiliar visualization
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Conclusions
 NOVIS model is believed to be the one of earliest qualitative studies
 Cognitive activities of novice users were effective for further studies
in that area
 NOVIS model research is effective for visualization literacy test items
and novice user’s visualization literacy
 Focus was given on the user’s sensemaking activities rather than
information visualization techniques
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