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Testing & research

Just noticeable research results

We’d like there to be research data to point us to design choices. But how relevant is it in the context of your project?

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We’d like there to be research data to point us to design choices. But how relevant is it in the context of your project?

Remember that when a researcher says something is ‘highly significant’ they probably mean it is statistically significant. This means that the result is robust and could not be just random. But you need it to be practically significant.

The research may be reporting a small difference to a very minor factor which in reality might be swamped by other variables. So you have to decide if the results matter in the context of your design decision.

For example, if you compare two typefaces to see which is most legible, it’s very unlikely that you’ll get a tied result.1 One will be better than the other, perhaps by just a little. You have to decide if it matters. And it may not be critical anyway. A distinguished professor of ophthalmology once pointed out to me that if the type is slightly too small, people can hold it closer to their eyes...

1. Robert Waller (2007) Comparing typefaces for airport signs Information Design Journal 15(1), 1–15

How this helps
Clients sometimes ask for scientific evidence for your recommendations. Check the research materials, who the participants were, and how significant the results were.
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