"Comparing the first half to the second half was like comparing chalk and cheese", he said.
"I thought we played very well in the first half. We passed the ball well, created plenty of chances and scored two good goals.
"But we always knew Stoke were going to come back at us in the second half and we just didn't cope with the threat that they posed.
"Had we scored a third goal I think we would have gone on and won the game comfortably, but it didn't come and then we played into their hands by giving the ball away - and you can't play this game without having the ball.
"It was very disappointing, especially with compared with what we did in the first 45 minutes and it's cost us two points.
"Now we're out the top six for the first time this season, but there's still a lot of football to be played and we've just got to work hard, get our heads down and prepare for the next game.
"What we need is to reproduce the sort of display that we gave in the first half. If we do that we'll certainly start winning games soon."