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Challenges and Pitfalls of Data Visualization

Challenges and Pitfalls of Data Visualization

"A picture says more than a thousand words"". This sounds like a true statement. While it's true that it is easier to tell a story with visuals than with words, it makes a huge difference which visual you are using for which story. What is the real story behind a visual. Using the wrong visual to tell a certain story can reduce the benefit of a visual to zero. In this presentation we will go through the challenges & pitfalls of Data Visualization.

Daan Bakboord

June 07, 2018
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  1. nlOUG Tech Experience 2018
    Challenges and Pitfalls
    of Data Visualization
    7 June 2018 - 14:00 - 14:45 / De Rijtuigenloods, Amersfoort

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  2. Welcome
    Daan Bakboord
    http://www.daanbakboord.com
    https://twitter.com/daanbakboord
    https://nl.linkedin.com/in/daanbakboord
    http://blog.daanalytics.nl
    #obihackers

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  3. Agenda
    • Introduction
    • Mind
    • Perception
    • Psychology
    • Thinking
    • Dashboard Design
    Challenges and Pitfalls of Data Visualization

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  4. Initiatives
    IT IT IT
    Reliable Information / Insights
    A B
    Change / Policy / Strategy
    Data

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  5. A picture says more
    than a thousand words

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  6. Visual Perception

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  7. Visual Perception

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  8. Visual Perception

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  9. Visual Perception -
    Process
    Register Observe & Interpret

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  10. Visual Perception
    • Iconic Memory
    • letters, colors, digits, shapes, etc.
    • e.g. Computer buffer
    • Short Term memory
    • chunks of information FiFo
    • e.g. Random Access Memorie (RAM)
    • Long Term memory
    • recognise people, events, patterns, etc.
    • e.g. Computer harddisk

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  11. “Gestalt” Psychology
    Overall picture before perception of components
    Figure /
    Ground
    Law of Grouping
    Whole
    is more than
    Sum of Parts

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  12. It’s all about Perception

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  13. Gestalt Principles of
    Perception
    Closure
    Proximity
    Similarity
    Continuation
    Prägnanz (Good Figure,
    Simplicity)

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  14. Optical Illusion

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  15. Optical Illusion

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  16. Two System Way of Thinking

    System I

    Thinking Fast

    Intuitive, “Gut” reaction

    Jump to Conclusion

    “Always On”

    System II

    Thinking Slow

    Reflection

    Problem solving

    Analysing

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  17. Dashboard Design

    Present information Logical and Ordered

    Signaling should be Clear and Unambiguous

    Choose the right Visualization

    Don’t give System I the opportunity to go wrong

    Optimal balance between System I & System 2

    Focus on the core message

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  18. Subconscious Attributes
    • Color (Intensity)
    • Shape
    • Positioning
    • Motion

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  19. Using Color
    98675321098739873947612902
    16438902451209137828462010
    08345601395660087414383020
    47294901837900298265150137
    98675321098739873947612902
    16438902451209137828462010
    08345601395660087414383020
    47294901837900298265150137
    Count the number ‘5’

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  20. Color Blind
    Experience Color Blindness via Color Oracle

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  21. Right
    Wrong
    Using Color
    Associations
    B & W Printing
    Too much color –where to focus?

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  22. Data Ink Ratio
    Edward Tufte

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  23. Data Ink Ratio
    • Minimize the Data Ink
    Ratio as much as
    possible
    • Increase the Data Ink
    Ratio if necessary to
    tell the story

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  24. After a demo by an Account Manager
    Visuals

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  25. Stephen Few
    http://www.perceptualedge.com/

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  26. Stephen Few
    Bullet Graph
    SparkLine

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  27. See the Signals

    Our Brains are better suited to
    process Images

    Turn complex data sets into Easy
    to Digest and Supporting Insights

    Identify interesting Patterns and
    Opportunities and Previously
    Unknown Trends

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