Wikipedia articles needing factual verification since January 2011 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... Ceiling effect Pages in category "Wikipedia articles needing factual verification since January 2011" This category contains only the following page. C Ceiling effect Retrieved from "http://psychology.wikia.com/wiki/Category:Wikipedia_articles_needing_factual_verification_since_January_2011"