Morison told reporters that the squad have always been behind manager Chris Coleman and never lost belief that they could secure a positive result.
The Norwich City striker said: "We always had the belief. We kept it from the games when we had been winning, even though we had lost a few.
"We have a great spirit and a great camp and we enjoy getting together.
"Everyone is turning up, which is fantastic. We have always been behind Chris and I think we showed that we are a very good team. I thought we made Scotland look very average."
Coleman's side look to build on the victory against Scotland when they continue their qualifying campaign with a trip to Croatia in midweek.