The midfielder added the Canaries' second goal during their 2-0 win over Sunderland last Saturday.
The Norwegian told Pink'un: "I told you during the week, I don't know what happens when we play at home. All of a sudden we have confidence, even though the last game was a horrible performance.
"To do that is much easier to sort out off the back of a win, because when you don't win away you have pressure on you to produce at home as well.
"We have a challenge against Swansea. They're a good team, a good team at home, so we have to try to do something to get a positive result."
Norwich currently sit 13th in the Premier League table.