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nlOUG Tech Experience 2018
Challenges and Pitfalls
of Data Visualization
7 June 2018 - 14:00 - 14:45 / De Rijtuigenloods, Amersfoort
Welcome
Daan Bakboord
http://www.daanbakboord.com
https://twitter.com/daanbakboord
https://nl.linkedin.com/in/daanbakboord
http://blog.daanalytics.nl
#obihackers
Agenda
• Introduction
• Mind
• Perception
• Psychology
• Thinking
• Dashboard Design
Challenges and Pitfalls of Data Visualization
Initiatives
IT IT IT
Reliable Information / Insights
A BChange / Policy / Strategy
Data
A picture says more
than a thousand words
Visual Perception
Visual Perception
Visual Perception
Visual Perception -
Process
Register Observe & Interpret
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
“Gestalt” Psychology
Overall picture before perception of components
Figure /
Ground
Law of GroupingWhole
is more than
Sum of Parts
It’s all about Perception
Gestalt Principles of
Perception
Closure
Proximity
Similarity
Continuation
Prägnanz (Good Figure,
Simplicity)
Optical Illusion
Optical Illusion
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
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
Subconscious Attributes
• Color (Intensity)
• Shape
• Positioning
• Motion
Using Color
98675321098739873947612902
16438902451209137828462010
08345601395660087414383020
47294901837900298265150137
98675321098739873947612902
16438902451209137828462010
08345601395660087414383020
47294901837900298265150137
Count the number ‘5’
Color Blind
Experience Color Blindness via Color Oracle
Right
Wrong
Using Color
Associations
B & W Printing
Too much color –where to focus?
Data Ink Ratio
Edward Tufte
Data Ink Ratio
• Minimize the Data Ink
Ratio as much as
possible
• Increase the Data Ink
Ratio if necessary to
tell the story
Graphs
Graphs
After a demo by an Account Manager
Visuals
Report
Stephen Few
http://www.perceptualedge.com/
Stephen Few
Bullet GraphSparkLine
JQuery
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
Questions?
Thanks!

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