Simon Church scored two of Reading’s goals in the game.
McDermott said: “We knew it was a big game because of where it could put us in the table and I’m pleased with our performance because this is a tough, tough place to come.
“Churchy got two goals but the whole squad stepped up tonight – our resolve was excellent.
“We’re proud as a group of our run but the players are the ones who have to play and compete – and they are playing some good football too.”