Hi Everyone, Thought this might be an interesting read; Draganich and Erdal (2014) suggest that the knowledge of sleep quality, can result in a placebo affect on your state of mind and cognition. http://www.theage.com.au/lifestyle/diet-and-fitness/its-the-thought-that-counts-with-sleep-20140129-31mv3.html Abstract only- http://psycnet.apa.org/psycinfo/2014-01016-001/