CS-5630 / CS-6630 Visualization for Data Science How to Critique a - - PowerPoint PPT Presentation

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CS-5630 / CS-6630 Visualization for Data Science How to Critique a - - PowerPoint PPT Presentation

Jun 17, 2023 365 likes •637 views

CS-5630 / CS-6630 Visualization for Data Science How to Critique a Vis and Exam Review Alexander Lex alex@sci.utah.edu [xkcd] Exam Format: Google Doc Link with Instructions Download doc or copy to edit Write concise and relevant answers

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CS-5630 / CS-6630 Visualization for Data Science How to Critique a Vis and Exam Review

Alexander Lex alex@sci.utah.edu

[xkcd]

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Exam Format:

Google Doc Link with Instructions Download doc or copy to edit Write concise and relevant answers (word limit) Redesigns by sketching by hand/tablet or in graphic design editor (no programming)

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Exam

Design Critique & Redesign (everyone, 80% of grade for grads)

Given a vis, analyze what’s good/bad and redesign. Analyze in the context of theory taught

Grads: Question about readings (Crowdsourcing, Interaction)

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How to Critique

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  • 1. Identify Data, Tasks / Intentions

E.g., Tabular data, network data, geospatial data quantitative, time-series -> Task: change over time qualitative labels (often supplementary) quantitative, two conditions -> compare ….

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  • 2. Identify Marks, Channels

Mark: encodes “existence” of item

point, line, shape, …

Channels: encodes “magnitude of dimension associated with an item

positizion, size, saturation, color, …

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Cole Nussbaumer www.storytellingwithdata.com/2011/07/death-to-pie-charts.html

Share of coverage

  • n TechCrunch
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  • 3. Is Effectiveness Principle

Followed?

Use the Best Visual Channel Available for the Most Important Aspect of your Data Are all visual channels appropriate?

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  • R. Cunliffe, Stats Chat
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  • R. Cunliffe, Stats Chat
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  • 4. Is the Expressiveness Principle

Followed?

The visualization should show all of the data, and only the data If there are violations, are they justified (useful chart junk)?

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  • 5. Perceptual Issues

Color blindness, color proximity effects, shadows, etc. Use of gestalt principles Use of popout

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  • 6. Scales

Are the scales appropriate

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Flowing Data

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  • A. Kriebel,

VizWiz

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  • 7. Context

Is the data shown in the appropriate context

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Global Warming?

Mother Jones

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Global Warming - Frame the Data

Mother Jones

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  • 7. Interaction

What kind of interaction is used? Is the interaction appropriate for the medium? Is direct manipulation used? What is the purpose of the interaction?

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  • 8. Would derived data be better?

E.g., show change instead of absolute values Show distribution instead of data points

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  • 9. Other Guidelines

No Unjustified 3D Time progresses linearly Appropriate legends, labels