The former Manchester United, Stoke and Wales man made the claim ahead of Friday night's 2014 World Cup qualifier at Hampden Park. The Scots are bottom of Group A with two points from four games, one behind Chris Coleman's men who won 2-1 when the two countries met at Cardiff in October.
Asked if the Scottish players would use Thomas' comments as motivation, Stoke midfielder Adam replied: "We will. That's up to him, it's his opinion. We will take that on the chin. That's what Mickey is like and I know him quite well with him coming into Stoke so I will have a word or two with him when we get back."
He added: "That was probably a little bit of kidology but we are ready for it, we have good players in the squad.
"It is about us, we don't need to worry about what other people are saying.
"It is going to be a tough game but we are looking forward to it."
Dundee-born midfielder Adam bore the brunt of the criticism for the defeat in Wales, but when the issue was raised the 27-year-old said: "That's your opinion. That's everyone in the press, they sell the papers and that's the way it goes.
"I deal with it internally, that's the way it is.
"The lads take the criticism that we got, fair or unfair, that's done and dusted, it's gone now.
"It's a different game and a different challenge for us, we are ready and hope we can get three points."
- Sports & Recreation