I have this problem, that I cannot find the studies, where there are said the facts that we all know, for example: http://en.wikibooks.org/wiki/GUI_Design_Principles information in this page - are we supposed to take this as a lemma or as a definition without proof or has there been case studies for it - for example 9.1 (Minimize eye and hand movements, and other control actions.).
Basically the question is: If i wanted to find out the best user interface practices - I can google it and there will be millions of results like "7 best web interface practices".
I am looking for research papers where this has been proved or shown. Currently I am trying to prove that constant logging in is an annoying problem and I want reliable sources that prove something like this. (Something similar to point 9 from wikibooks article)
Another problem I am looking a solution for is: preferences should be saved. (Something similar to point 11 from wikibooks article).