Two Pages of Evidence

This post originally appeared on the Software Carpentry website.

Andreas Stefik and his colleagues have written [a two-page summary](http://quorumlanguage.com/evidence/evidence.pdf) of what we actually know about usability and programming language design. There aren't nearly as many results yet as we want or need, but what the people working in the field have shown is that we actually can answer these questions scientifically, and that answering them correctly actually does have an impact.