Are Results In Different Positions Ranked By Different Algorithms?

In this video, featuring Matt Cutts, the head of Google Search Spam, he answers the following question,

“Do Google use the same algorithm to rank all the results on page 1, or different algorithms for a wider variety in the results? (Pos. 1-3 – primary focus on freshness Pos. 4-6 – primary focus on backlinks Pos. 7-10 – primary focus on social signals)”