Are results in different positions ranked by different algorithms?

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)
Jacob Worsøe, Denmark

Have a question? Ask it in our Webmaster Help Forum:

Want your question to be answered on a video like this? Follow us on Twitter and look for an announcement when we take new questions:

More videos:
Webmaster Central Blog:
Webmaster Central: