Kaboul says manager Harry Redknapp has been crucial in his career.
He told the Daily Mail: "Was I a late developer? Yes, maybe. I've grown up more. I've learnt a lot as well at training. Joe Jordan works with us defenders and Harry's (Redknapp) been very important. He's played a big part in my career because he signed me twice (at Portsmouth and for Kaboul's second spell at Spurs).
"I'm very proud of that because it means he believes in me. That shows me he's got some confidence in me, so I have to give him that back on the pitch. I think concentration was a little bit of a problem. I didn't know where I was standing sometimes, so it was a bit difficult. Then I just started to focus on my position and believe more. And that's why it worked.
"I've just been more aggressive - in a good way, of course. I've tried to be more dominant, take control and be more involved in the game.
"I'm not a midfielder and I played at rightback because there were a lot of injuries, so I did the job. But my position is centre-back and nothing else."