Caulker: Redknapp key to QPR choice
The 22-year-old England international was allowed to travel to the London club for tests after Cardiff accepted an offer and he officially signed for the club on Tuesday.
"'Harry was a big factor for me, having worked with him at Tottenham.
"Being able to play with Rio Ferdinand was also a big draw. He has been a role model for many years, along with Ledley King.
"Our first aim this season has to be to get to 40 points, to make sure we stay up."
For the big stories and the banter follow us on Twitter: @tribalfootball