books.google.co.uk - The polygraph, often portrayed as a magic mind-reading machine, is still controversial among experts, who continue heated debates about its validity as a lie-detecting device. As the nation takes a fresh look at ways to enhance its security, can the polygraph be considered a useful tool?The Polygraph...http://books.google.co.uk/books/about/The_Polygraph_and_Lie_Detection.html?id=D6ag4vwF3A8C&utm_source=gb-gplus-shareThe Polygraph and Lie Detection
