Play the game with the computer on 'Novice' mode to have the computer learn how to play rock, paper, scissors from scratch.
Then, play the game on 'veteran' mode, to allow the computer to search a database of past experiences and use that knowledge against you.
Play 15 rounds in each and report your score in the comments section!
http://www.nytimes.com/interactive/science/rock-paper-scissors.html?ref=science