Jakob Nielsen answers "how little do users read"?

Jakob Nielsen’s current Alertbox column looks at how much users actually read on the web:

Summary:
On the average Web page, users have time to read at most 28% of the words during an average visit; 20% is more likely.

We’ve known since our first studies of how users read on the Web that they typically don’t read very much. Scanning text is an extremely common behavior for higher-literacy users; our recent eyetracking studies further validate this finding.

The only thing we’ve been missing is a mathematical formula to quantify exactly how much (or how little) people read online. Now, thanks to new data, we have this as well.

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