Repeat the main message inside the chart
For explanatory reading of a single visualization, use repeated message cues on the chart to improve insight and address missed conclusions for readers interpreting the figure directly.
- purpose:refine
- basis:empirical
- task:compose
- quality:insight
- lever:text-annotation
- communication:framing
- component:annotation:use
- polish:annotation
advice
Add message redundancy
Repeat the chart’s main conclusion in more than one place inside the visualization. For example, restate the takeaway through the title plus an explanatory annotation, label, short text block, or reinforcing picture.
reason
Why message redundancy works
Readers recall the message better when the chart tells them the same conclusion through multiple cues. Repetition helps the viewer grasp the main trend instead of only seeing the marks.
Mechanism: Repeating the same conclusion across text or pictorial cues gives the viewer more than one route to encode and retrieve the message.
Evidence: Visualizations with message redundancy had higher average description quality than those without it, and the best-described visualizations were much more likely to contain message redundancy than the worst-described visualizations (Borkin et al., 2016).
context
Use when the visualization has a clear main conclusion
- User Goal: Help viewers remember the main takeaway of the chart.
- Task: Explanation and later recall.
- Chart Setting: The visualization is meant to stand on its own and has a main trend or conclusion that can be stated explicitly.
- Success Criterion: Reviewers can later describe the chart’s main message, not just its visual form or data field names.
exceptions
Do not use this when the chart has no single message to restate
Break it when: The visualization does not have one clear main conclusion that can be explicitly repeated. Why: The paper defines message redundancy as presenting the main conclusion or message in multiple ways.
costs
Tradeoffs of message redundancy
Sacrifice: You use extra words or visual space.
Risk: Repeated cues can feel cluttered if they do not restate the same conclusion.
Mitigation: Repeat one clear message in a small number of coordinated places.
mistakes
Common message redundancy failure
Mistake: Adding extra text that describes parts of the chart without restating the main conclusion. Why it fails: The added material increases content without strengthening recall of the takeaway.
check
Check whether the message is repeated
Failure Sign: Reviewers can identify the chart’s topic but cannot state its main conclusion.
Quick Check: Inspect the figure and count whether the main takeaway appears in more than one cue such as the title and an annotation or short text block.
Stronger Test: After a short viewing, ask a reviewer to summarize the chart; if they describe only the marks or fields, add another message cue.
fix
Fix message redundancy
- Add an annotation that explicitly names the main trend or conclusion.
- Rewrite the title or supporting text so it repeats the same takeaway as the annotation.
- Add a reinforcing picture only if it conveys the same message rather than a different one.