Observational study Category page Create Classic editor “ Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Natural experiment “Assessment| Biopsychology| Comparative| Cognitive| Developmental| Language| Individual... Observational studies “Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual... Quasi-experimental methods Pages in category "Observational study" The following 3 pages are in this category, out of 3 total. Observational studiesN Natural experimentQ Quasi-experimental methods Retrieved from "http://psychology.wikia.com/wiki/Category:Observational_study" Ad blocker interference detected! Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.