Cue each shown object or action in the narration
For ordered-time narrated visuals, use synchronized narration on dynamic displays to improve fidelity and mitigate missed objects or actions for viewers learning an unfamiliar process.
- purpose:refine
- basis:empirical
- time:ordered-time
- temporal-pattern:dynamic
- quality:fidelity:use
- lever:text-annotation
advice
Synchronize narration with the visual event
Write the narration so it names the object or action while that object or action is on screen. For example, mention the current object when its label is visible, and state the action as the animation of that action occurs.
reason
Why synchronized narration works
Viewers do not reliably infer the intended meaning of an object or action from the image alone. Naming the visible event in the narration reinforces what the viewer should encode.
Mechanism: A spoken cue pulls attention back to the relevant visual item and helps bind the words to the object or action being shown at that moment.
Evidence: The paper reports that objects and actions shown without speech cueing were poorly recalled, while items cued in the speech track were better recalled; the redesign added synchronized speech cues for important actions (Faraday & Sutcliffe, 1997).
context
Use when the display is narrated and stepwise
- User Goal: Understand and remember a visual process explanation.
- Data: Important objects and actions appear over time.
- Chart Setting: A dynamic display uses narration alongside labels or animation.
- Audience: Viewers are not assumed to know the specific subject matter.
- Success Criterion: Viewers recall the intended object-action sequence after one viewing.
exceptions
Do not rely on narration alone for central complex points
Break it when: The narrated point is complex or central to the explanation. Why: The source found that important speech-only information was still poorly recalled and recommended adding a concurrent caption.
costs
What synchronized narration costs
Sacrifice: You give up freedom to script narration independently of the visuals. Risk: If the narration leads or lags too far, viewers may connect it to the wrong visual event. Mitigation: Time the spoken cue to the visible reveal or action.
mistakes
Common narration misuse
Mistake: Letting an important animated action carry the message without naming it in speech. Why it fails: Viewers may remember the motion but not the intended meaning.
check
How to test narration timing
Failure Sign: Viewers remember visible objects but omit the intended action or relation. Quick Check: Compare each important on-screen object and action against the script and see whether it is named at the moment it appears. Stronger Test: Show the sequence once and ask viewers to list the key steps.
fix
What to change
- Add a spoken cue for each important object as it appears.
- Add a spoken cue for each important action while the action is animated.
- Retime the script so the cue overlaps the visual event.
- Remove important steps that are carried only by image or animation.