Fact of life #1:
We don’t read pages. We scan them.
One of the very few well-documented facts about Web use is that people tend to spend very little time reading most Web pages.1 Instead, we scan (or skim) them, looking for words or phrases that catch our eye.
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Fact of Life #2
We don't make optimal choices. We Satisfice.
When we’re designing pages, we tend to assume that users will scan the page, consider all of the available options, and choose the best one.
In reality, though, most of the time we don’t choose the best option—we choose the first reasonable option, a strategy known as satisficing. As soon as we find a link that seems like it might lead to what we’re looking for, there’s a very good chance that we’ll click it.
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Fact of life #3:
We don’t figure out how things work.
We muddle through.
One of the things that becomes obvious as soon as you do any usability testing—whether you’re testing Web sites, software, or household appliances—is the extent to which people use things all the time without understanding how they work, or with completely wrong-headed ideas about how they work.
Faced with any sort of technology, very few people take the time to read instructions. Instead, we forge ahead and muddle through, making up our own vaguely plausible stories about what we’re doing and why it works.
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