I am trying to identify four key milestones in cognitive psychology

http://www.muskingum.edu/~psych/psycweb/history/cognitiv.htm

http://en.wikibooks.org/wiki/Cognitive_Psychology_and_Cognitive_Neuroscience/Cognitive_Psychology_and_the_Brain

http://answers.yahoo.com/question/index?qid=20080608163359AAsyCXh