Powers of 10: Time Scales in User Experience (Jakob Nielsen's Alertbox)

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16 Dec 09

Boris Goldowsky
usability time fun
12 Oct 09

Jesse Whitworth
usability programming user experience web
Thomas Bonney
time usability user experience alertbox
11 Oct 09

Frederik Van Zande
"From 0.1 seconds to 10 years or more, user interface design has many different timeframes, and each has its own particular usability issues. "

usability user experience user experience design speed time interaction design loading
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- .1 second is the response time limit if you want users to feel like their actions are directly causing something to happen on the screen.
- 0
  .1 second is the response time limit if you want users to feel like their actions are directly causing something to happen on the screen.
- 3 more annotations...
- - users retain the feeling of being in control of the interaction even though they notice that it's a 2-way interaction (between them and the computer).
  - The average page visit lasts about 30 seconds, but the more experienced the users are, the less time they allocate to each Web page.
  - most Internet videos should last no more than 1–2 minutes because people don't like passively watching something for much longer than that while they're in the active frame of mind induced by Web surfing.
    
    Most website visits last about 2–4 minutes.
09 Oct 09

Rick McCraw
Time Nielsen
08 Oct 09

Yun Huang Yong
From 0.1 seconds to 10 years or more, user interface design has many different timeframes, and each has its own particular usability issues.

internet time timeframes user experience useit
07 Oct 09

Chris Strauber
Lays out based on research how quickly things need to happen on a website to keep people focused on their tasks. Our multi-step, multi-stage, multi-resource process does not fit comfortably at all in the "less than 10 seconds" category.

website usability user-experience
06 Oct 09

faimone Björn
- h decisions about a Web page's visual appeal after being exposed to it for as little as 50 ms,
- Second, people spend a few seconds looking over the page before they decide what to do about it.
- 22 more annotations...
- - Still, the study does show that people can form basic visual impressions very quickly, at the limits of human perception.
  - 0.1 second is the response time limit if you want users to feel like their actions are directly causing something to happen on the screen. For example, if you click on an expandable menu and see the expanded version in less than 0.1 seconds, then it feels as if you made the menu open up. If it takes longer than 0.1 seconds for the revised state to appear, then the response doesn't feel "instantaneous" — instead, it feels as if the computer is doing something to make the menu open.
  - which is a big reason to emphasize clarity in content usability.
  - his means that during 1-second response times, users retain the feeling of being in control of the interaction even though they notice that it's a 2-way interaction (between them and the computer). By contrast, with 0.1 second response times, users simply feel like they're doing something themselves.
  - or Web usability, this means that new pages must display within 1 second for users to feel like they're navigating freely; any slower and they feel held back by the computer and don't click as readily.
  - After 1 second, users get impatient
  - after about 10 seconds, the average attention span is maxed out.
  - 10 seconds is also the time users typically allocate to examining a page before deciding that it's so bad that they're going to leave.
  - average page visit lasts about 30 seconds
  - People are impatient on the Internet. Instantly gratify them, or they're out.
  - Users should be able to complete simple tasks in about 1 minute. Awkward sites that require much more than a minute for basic tasks — such as transferring money from a savings to a checking account — will be abandoned.
  - most Internet videos should last no more than 1–2 minutes becaus
  - Most website visits last about 2–4 minutes.
  - 10 minutes would be a long visit to a website.
  - 1/2 of e-commerce purchases occurred within 28 minutes
  - 1 day is the maximum turnaround for customer service requests
  - transactional email and confirmation messages within 1 minute
  - monitoring
  - Facebook and Twitter tend to be daily habits (or more for some people), whereas MySpace and LinkedIn tend to be checked weekly.
  - This means that sites must support revisitation behaviors, for example by keeping track of what users have done in previous visits.
  - y of Amazon's customers have used the site for years and thus have the background required to cope with the site's numerous features.
  - 10 years for users to develop deep expertise in a complex system such as Unix
05 Oct 09

Kristan Hodge
performance unfinished interrupted