Lab Experiment - manipulate the IV, measure the DV!

Field Experiment - manipulate the IV, measure the DV!

Natural Experiment - don't control the IV, measure the DV!

Naturalistic Observation

Correlations

Questionaires

Interviews - qualitive data - structed, semi-structed, unstructed

Case Studies - in depth research about one person eg genie

Content Analysis - analysing something that already exists