The former Crystal Palace midfielder said: "It was a tough decision but I think I made the right one. I was at Palace for 13 years and I think it was time for a change.
"I was up in Middlesbrough and my agent made me aware Wigan were interested and as soon as I knew that I wanted to speak to them.
"I spoke to Steve, who was gaffer at Palace when I was a young lad there, and he was straightforward with me.
"He spoke highly of the club but walking into the training ground there was a buzz about the place.
"Being seventh in the Premier League you are going to be on a high and the lads were buzzing and that was probably the main factor.
"Wigan are in a fantastic position to crack on and push up the table even more."