The result strengthened Villa's chances of a top four finish and Champions League qualification.
James McGinn and Ollie Watkins struck as Villa won 2-0, with Emery stating afterwards: "It is very difficult to win matches in the Premier League. Today I am delighted with how the players responded. We set them a challenge not only to win but to feel confidence in our structure. In the first half it was maybe the best half we have played here this year.
"We stopped them and we did everything like we planned. We needed at home to recover our confidence and energy, to be consistent over 90 minutes and to win. We are very motivated for the rest of the season for the Europa League and to be in the top positions in the league.
"We are working a lot on set pieces and the players responded fantastic.The objective after the break is to keep doing what we are doing now."
On Watkins, the manager added: "He is a fighter and today he played a fantastic game. He deserved to score. He was fighting with the centre back and was close to scoring and he was pushing and helping us be in the attacking third.
"Holding up passes offensively and then he had to get in the opponents box to score the sort of goal he got.
"Now he must be focused with us to recover his confidence and numbers. Getting his numbers again he will be close to being back with the national team."