Irvine, having previously managed both Preston and Sheffield Wednesday, was the surprise choice for West Brom when they decided to replace Pepe Mel in the summer.
He saw his team get their first league win last Sunday at Spurs and said, coupled with their Capital One Cup win, had given the players a real lift this week,.
But he said: "The players have been good anyway. They haven't let their heads drop even with a couple of disappointing results.
"Their approach in training every day has been absolutely fantastic from day one and right the way through. There's never been a session where I've had to bark at them and get them going and they've maintained that level of training, that level of concentration all the way through even after the disappointing defeats against both Swansea and Everton when the result was worse than the performance.
"I think they believed in what we were trying to do and they've been given their rewards now for persevering with the things that we've been trying to do."
Looking towards tomorrow's game, he said of Burnley: "They are really enjoying their time in the Premier League by the way that they're playing. I've watched three of their games and the fact is that they have been extremely competitive in all three of those games and could easily be sitting with more points than they've actually got.
"They are a really good unit. They work together as a team and they've got a great work ethic. They are honest and they are very, very well organised and they've got some good players.
"There's no question that this is a very difficult game and a game that we need to approach in exactly the same way as we did at Tottenham."
He said, above all, their attitude had to be right. "If it isn't then Burnley will certainly make us pay because one thing is for sure, their attitude will be right," he concluded.
Sean Dyche is still looking for his first Premier League win but he remains confident that it is just a matter of time before we get three points from a game.
He said: “We look at the positives of the season and there are some really good signs about how we are going about our business. The incentive is to build on what we are doing and turn performances into wins.
“We are hungry to get that first win because we think that will lead on from there. It often does, so we continue the work and add on to that what we see fit to open things up."
He added: “If you always do what you have done, you always get what you have always got, so we need to do different things to open up teams.
“We are so close, but so far away from getting that first win, and generally we have done really well with our performance levels. Over time, I believe that will bring rewards and that, in this case, equals wins. There are no guarantees, but we believe that victories are within our grasp.”
He added: “We are having to learn quickly and on the job, and we are learning and picking things up physically and mentally. It’s important that we are aware of that, but I’m aware that I’m new to this too. It’s a great experience for us and we want to use everything we can.
“Whatever happens, it still comes down to winning football matches and I am absolutely, acutely aware of that and that’s what we intend to do. We’ve had three clean sheets and tactically we are very, very sound. We just need that bit more of a clinical edge in the final third.
“That’s top level football, but the good news is the framework, energy and way we defend is intact. Now it’s just changing that defensive shape into a balanced attack and scoring goals.”
There have been some surprise results already this season, and that includes that West Brom win at White Hart Lane.
“The topsy-turvy nature of football is affecting the Premier League perhaps more so this season than in recent seasons," he admitted.
“It just goes to show that results are there. Teams are finding their feet, players have gone away to World Cups and come back and all the changes of managers and philosophies all go into the melting pot.
“We can only think and look after ourselves. It comes down to us delivering performances.”