Sean Dyche's side have won three of their last four Championship games and have kept clean sheets in each of their victories, as they look to keep their playoff hopes alive.
Grant told the club's official website: "The difference recently has been the mentality. The focus has become much more balanced and people are very tuned into what is being asked of them.
"We are very determined and defending with much more pride and I think we are doing that really well.
"We have had that drilled into us since the new management came in and the lads are buying into it really well."