Information Design and Data Visualization
Making Information Understandable
Information design is clarity work
Information design organizes complex content so that people can compare, interpret, and act on it quickly. The best visuals reduce mental effort without distorting the underlying meaning.
Accuracy first
A chart that looks impressive but misleads the viewer is a failed design, not a successful one.
Choosing the right chart
Chart selection guide
| Goal | Good choices | |
|---|---|---|
| Compare categories | Bar chart | |
| Show trend over time | Line chart | |
| Show parts of a whole | Pie chart only when categories are few | |
| Show relationship | Scatter plot | |
| Show process or sequence | Flow diagram |
Designing an effective chart
-
1
Step 1: Identify the question the chart must answer.
-
2
Step 2: Remove unnecessary decoration that competes with the data.
-
3
Step 3: Use labels, scale, and color to support quick reading.
-
4
Step 4: Highlight the key takeaway rather than every possible detail.
-
5
Step 5: Check that the chart does not distort proportions or comparisons.
Which chart type is usually best for showing change over time?
Line charts are strong for showing trends over time.
Correct answer: Line chart
What is the most important priority in information design?
Information design should make meaning easier to understand quickly and accurately.
Correct answer: clarity
What should you remove first from an overly busy data graphic?
Removing chart junk improves clarity while preserving essential information.
Correct answer: Unnecessary decoration