I was just reading up on one of the most recent eye tracking studies that was performed at Cornell University by Laura A. Granka, Thorsten Joachims and Geri Cay. They used a sample of undergraduate students and instructed them to perform a search in Google. For 397 queries on topics covering movies, travel, music, politics, local and trivia. The following was found to be the users click pattern on the SERP:

Google SERP Click and Attention distribution ‘heat-map’