Fer failed to thrive under former manager Chris Ramsey’s stewardship over the early part of the season, with his performances falling short of his best.
However, the Dutch midfielder has been given a crucial role by Hasselbaink in an advanced position, and Fer says he is starting to regain his confidence.
“We lost our way earlier in the season, and played a different system and it didn’t work,” Fer said. "But now we’re playing high pressure and balls into the striker.
“He’s now trying to play me with Junior who can go outside and me inside and the other way round - it gives us a lot of freedom, and we can link up very well.”
“It’s been hard to not play in the competition I normally play, but when the gaffer came in he’s given me a lot of confidence.”
Fer was heavily linked with a move to Sunderland before the season started, but the transfer failed to materialise.
Since then speculation surrounding the 26-year-old’s future has died down, with his performances failing to catch the eye.
Fer has scored just twice in 18 Championship appearances this season, but if Hasselbaink can get the powerful midfielder back to his best then he will have one of the most talented players in the Football League at his disposal.
QPR have won just one of their first 10 matches with Hasselbaink at the helm and they drew 1-1 with Wolverhampton Wanderers in their most recent outing.