If you’ve ever wondered just how well some famous effects have replicated, I encourage you to check out http://www.psychfiledrawer.org/. This site lists a number of influential studies (such as Bargh, Chen, and Burrows’ priming study on age-related stereotype activation) with links to successful and unsuccessful replications, as well as conceptual replications. This is great for getting into the nuances of research design, confounding variables, and the difficulties that psychological research attempts to overcome. 
