Doherty Threshold

Keep feedback fast enough to sustain flow.

01 / UNDERSTAND

The idea

Responsive feedback helps people stay connected to an interaction. The commonly cited 400 ms threshold is a historical guideline, not a guarantee of engagement. Distinguish acknowledging an action from finishing a longer operation.

Rapid feedback helps an interaction feel continuous. The frequently quoted 400 ms figure is a historical interaction guideline, not an exact limit that predicts every user’s behaviour. When a task must take longer, distinguish immediate acknowledgement from eventual completion. Showing useful content early can reduce the cost of waiting.

02 / RECOGNISE

See it in real products.

Examples of how the principle can appear in an interface.

YouTubeEXAMPLE 01

Prioritise information that supports a decision

YouTube can show titles and other video information before thumbnails finish loading. A slower image request need not prevent the reader from understanding the available content.

YouTube · Interface example
ChatGPTEXAMPLE 02

Prepare the next content before it is needed

The illustrated ChatGPT feed loads further items during browsing. The underlying pattern is to anticipate a likely next action, while keeping loading status understandable.

ChatGPT · Interface example
DuolingoEXAMPLE 03

Design the moments when people wait

Duolingo’s loading experience prompts a discussion of perceived performance. An engaging wait still needs an honest indication of progress.

Example source

03 / CONNECT

Why it matters.

Slow or unexplained responses can cause frustration and loss of interest. Acknowledgement and useful partial content can improve an unavoidable wait without inventing progress.

Possible influences to investigate, rather than guaranteed outcomes for every product.

04 / APPLY

Put it into practice.

  1. 01

    Acknowledge input promptly

  2. 02

    Keep the interface responsive

  3. 03

    Show meaningful status for longer operations

05 / EXPLORE WITH UPSLIDE

Apply it with Upslide.

Use a practical guide, read a deeper explanation, or examine a related Upslide project.

Keep exploring

70 PRINCIPLES TO EXPLORE

The UX glossary

Current principle: 15 of 70 · Alphabetical order

THE UX GLOSSARY

Find your next idea.

PASS THE IDEA ALONG

Share this page

LinkedIn WhatsApp Email

UPSLIDE DESIGN STUDIO

Watch the explainer

Playback unavailable? Watch on YouTube ↗

SHARE WHAT YOU NOTICED

Contribute an example.

Share a screenshot and a few words. We’ll review it before publishing.

Add links or contact details (optional)

Reviewed by the Upslide team.