Mick McCarthy`s men dominated from the off and earned the three points thanks to Stephen Hunt`s first-half strike.
"We never really started until the substitutes came on. We had a go at Wolves then and it was the first time we pinned them back," said the Scot.
"But I think you have to give Wolves a lot of credit, they lost some key players and I didn't know whether psychologically that put some complacency in their heads.
"But at the same time I did say to the players that Wolves really had a cause, the fact they're in the bottom three is one and then losing those big players I'm sure gave every other player an extra 10%.
"It was a poor performance. If you've seen us in all our games this season you'll see that was out of character but you have to give Wolves credit."