Well, although Kelly says he is not focusing on graphics in his work, the high contrast and graphic nature of his work brought on the tell-tell bright white light that tells me a migraine is coming my way.
See what I mean:
Artists don't have to worry about function so much, but interior designers do.
In design school I learned always to have at least one reason for any choice (and "I like it" is not one), and to always think about function or effect. For example, I learned to consider color choices in terms of their effects. Stuff like: yellow is intellectually stimulating (so it goes on the walls of schools - remember that pale stuff we all endured?); red is a color we respond quickly to, but then it tires us out a little (so it goes in brothels!); or photos of nature are soothing and even curative (great for hospitals and clinics).
This was just part of design. I didn't learn the words "evidence-based design" until recently.
And I think it is just another way of describing good design. Steve Jobs had it right when he said:
Design is a funny word. Some people think design means how it looks. But of course, if you dig deeper, it's really how it works.
Read more at http://www.brainyquote.com/quotes/authors/s/steve_jobs.html#WrFkyusJmYW0JdIW.99