"Players need to understand all the inputs and all the outputs to make interesting, informed decisions. These are the mechanisms through which we express our will in the game. This is the machinery that transforms our medium from passive to interactive... This is a multifaceted (and as far as I'm aware, relatively unexplored) issue, but we can begin making inroads. Making games more readable begins with two things- empathy and data." Nels on Don Norman and readability, amongst other things.

"Most usability experts will agree, Dr. Donald Norman’s book “The Design of Everyday Things” is required reading for any aspiring user experience or product designer. But it’s also an excellent resource for game creators – even if it’s less commonly found on studio bookshelves." NGMoco's blog, on POET, and what it means for game designers. Not rocket science, but really well explained to a non-specialist audience.