After James Collins missed a penalty in the opening two minutes, the Town regrouped and found what proved to be the winner as Harry Cornick picked out his fellow striker midway through the first half.
The result lifts the Town off the bottom of the table, now sitting in 23rd, seven points from safety.
Jones said: “What pleased me was the same level of performance that we got on Saturday but this time we got rewarded. The level of performance has been there for the last five games and I’ve got a group of players that I’m proud of, I love their honesty, people have been trying to fraction us many times, but the group is together and it’s such a powerful tool.
“I’ve not felt it in a dressing room really since I’ve played, I thought it had gone out the game. Results is one thing but performances are another and our performances have been totally acceptable.
“Nobody makes any excuses for us and the boys keep coming back. My staff work their backside off every single day, the players work their backsides off to try and keep the club in the Championship.
“I’m delighted with the standards because that’s all I spoke about in the dressing room on Saturday, can we learn our lessons and can we take our chances when they come along? There was only one but it was enough, we didn’t get one on Saturday.
“Then, can we manage the game better when we’re under pressure. We spoke about firstly can we do it on the ball with composure and quality. Human beings learn their lessons, that gives me enormous pleasure.”