Goals from Rickie Lambert and Jason Puncheon put the visitors 2-0 up at the break and, after Junior Hoilett halved the deficit, an Anton Ferdinand own goal settled the argument.
Adkins said: "We got on the front foot, which was important. We believe we can pass the ball - we've demonstrated that on numerous occasions this season.
"We believe we can score - we've scored three goals away from home and created good opportunities throughout the game.
"There was a good resolve - we're growing in maturity all the time. We've a young group of players who are learning lessons very, very quickly and there's been several good performances of late.
"In any game the first goal's crucial. We got it, and we got a good one just before half-time from Jason Puncheon, who had a really good game again for us.
"Lambert was a threat all day - he scored with a brave header, and old-fashioned centre-forward's header. He put his head in where it mattered.
"We knew QPR would come at us in the second half, but the players dealt with the situation very well. We had good game management, and all credit to the players. It was an excellent three points away from home."