You are not currently logged in. Please create an account or log in to view the full course. Classic View Psychology A Level Edexcel A Level Psychology (9PS0) Psychological Skills 9.1 Methods 9.1.3 Experimental/Research Designs Classic View 9.1.3 Experimental/Research Designs RESEARCH METHODS – BUILDING AN EXPERIMENT Experimental Designs Dr Eoin O'Sullivan, University of St Andrews