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But tree tests are not all sunshine and lollipops. Some of our tasks will probably look like this one, again from InternetNZ: 
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The correct answer in under Policies, in a section called Jurisdiction, but 87% of our participants failed to find it. Only 3% gave up, so where did all the others go?
The answer is that they went everywhere. Graphically, this is what “everywhere” looks like: 
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Quite the mess. But what can we learn from it?
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For example, let’s look at the Projects by name section more closely: 
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A large chunk of participants came here, and the correct answer (Jurisdiction) was waiting for them, but most didn’t choose it (partly because it’s more abstract than the other topics).
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The graph makes another problem obvious too – the “leakage” at the top level of the tree: 
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Right at the start, as their first click, a large fraction of the participants ran off in all directions. This is not what we intend when we design a site structure. It suggests that either:
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