Learning Visualizations by Analogy: Promoting Visual Literacy through Visualization Morphing.

Area of Science:

• Information Visualization
• Human-Computer Interaction
• Educational Technology

Background:

• Traditional methods for teaching data visualization often rely on textual descriptions, which can be abstract and difficult to grasp.
• Understanding novel visualization techniques presents a significant challenge for users, hindering effective data exploration.

Purpose of the Study:

• To introduce and evaluate a novel paradigm for teaching and learning unfamiliar data visualizations through visual analogy and gradual transitions.
• To demonstrate the effectiveness of a "morphing" technique that visually bridges the gap between known and unknown visualization methods.

Main Methods:

• Developed a visual morphing technique to transition between pairs of visualizations (e.g., data table to parallel coordinates).
• Presented four distinct visualization pairs as examples: data table/parallel coordinates, scatterplot matrix/hyperbox, linear chart/spiral chart, and hierarchical pie chart/treemap.
• Conducted user studies to assess the learning effectiveness of the proposed analogy-based approach.

Main Results:

• Participants demonstrated significantly improved comprehension of unfamiliar visualization techniques after interacting with the visual morphing transitions.
• The analogy-based learning approach proved effective across all four tested visualization pairs.
• The effectiveness of the analogy was commutative, meaning either visualization in a pair could serve as the familiar starting point.

Conclusions:

• Visual analogy and morphing represent a powerful and effective pedagogical tool for teaching data visualization.
• This purely visual approach overcomes limitations of textual explanations, enhancing user understanding.
• The identified visualization pairings and transition strategies can inspire future research in visualization education and interaction design.