Remove verbatim on-screen text when narration already explains an animation
For explanatory viewing with animation and narration, avoid duplicate on-screen sentences on the same display to improve insight and mitigate incidental processing spent reconciling identical word streams for viewers following motion and speech at once.
- purpose:refine
- basis:empirical
- quality:insight
- lever:text-annotation
- temporal-pattern:dynamic
- component:label:avoid
advice
Remove duplicate sentence text from narrated animation
Remove verbatim on-screen text when narration already explains the animated graphic. For example, keep animation with narration, not animation with narration plus the same full sentences displayed at the same time.
reason
Why removing redundancy works here
Duplicate spoken and printed sentences make viewers process the same verbal stream twice and reconcile the two forms while also following the animation. Removing the duplicate text leaves more capacity for understanding the visual explanation.
Mechanism: The redundant text adds incidental processing in the visual channel and competes with the animation for attention, even though it repeats information already available in speech.
Evidence: Across three studies, learners showed better problem-solving transfer from animation with narration alone than from the same animation with narration plus identical on-screen text (Mayer & Moreno, 2003).
context
Use when narration and animation already run together
- User Goal: Understand an animated explanation of a process or system.
- Task: Follow motion and spoken explanation together.
- Data: Ordered visual steps paired with narration.
- Chart Setting: An animated graphic already has narration, and the current design also repeats the same words as full on-screen text.
- Audience: Viewers processing animation and speech at the same time.
- Success Criterion: Viewers can explain or transfer the process after viewing.
exceptions
Do not use when there is no concurrent animation
Break it when: There is no concurrent animation competing for the visual channel. Why: The paper reports that on-screen text can help when viewers only read and listen, but not when they must also process animation.
costs
Tradeoffs of deleting the duplicate text
Sacrifice: The exact wording is no longer persistently visible during the animated sequence.
Risk: Adding the same full text back as subtitles during the motion recreates the overload.
Mitigation: Keep the narration and animation as the active paired media during the animated sequence.
mistakes
Common failure mode
Mistake: Treating full verbatim subtitles as harmless reinforcement while the animation runs. Why it fails: Viewers spend capacity reading and reconciling duplicate word streams instead of processing the animation.
check
Check for redundant wording
Failure Sign: The display shows full sentence text that matches the narration while the animation is active.
Quick Check: Compare a few moments of on-screen text to the audio. If the wording is essentially the same, the presentation is redundant.
Stronger Test: Compare the narrated animation against a version that also adds identical on-screen text.
fix
Fix redundant text
- Delete verbatim on-screen sentences from the active animated sequence.
- Keep the narration and animation as the main paired media.
- Move any necessary text to nonanimated moments instead of displaying it during the motion.