Rules of thumb Create Talk0 Category page This page needs content. You can help by adding a sentence or a photo! Add to this page! “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Pareto principle Pages in category "Rules of thumb" This category contains only the following page. P Pareto principle Retrieved from "http://psychology.wikia.com/wiki/Category:Rules_of_thumb"