CRJ200 OVERSHOT FINAL BECAUSE THE PF WAS PLANNING HIS APCH TO THE PARALLEL RWY.

Narrative

I WAS FLYING WITH A BRAND NEW FO WITH LITTLE TIME IN THE ACFT AND AIRLINE ENVIRONMENT. WE WERE COMING INTO PHX FOLLOWING A SLOWER ACFT INTO PHX AND WE WERE SLOWED BACK TO 160 KTS. IT WAS DARK WITH NUMEROUS ACFT INBOUND TO THE ARPT. THE APCH CTLR VECTORED US ONTO THE BASE LEG FOR RWY 25L. WE TOLD HIM WE HAD THE PRECEDING ACFT IN SIGHT AND WOULD MAINTAIN VISUAL SEPARATION FROM HIM. THE CTLR THEN CLRED US FOR THE VISUAL APCH. MY FO CONTINUED ON THE BASE LEG WITHOUT MAKING THE TURN TO FINAL. I STATED; 'WE NEED TO START TURNING.' HE ACKNOWLEDGE MY COMMENT BUT DID NOT START THE TURN. THE CTLR POINTED OUT ADDITIONAL TFC AHEAD THAT WAS ON FINAL FOR RWY 26 TO PHX. I REPLIED THAT WE HAD HIM IN SIGHT. MY FO CONTINUED ON THE BASE LEG WITHOUT TURNING. I RESTATED AGAIN MORE FORCEFULLY; 'WE NEED TO TURN TO THE ARPT!' HE SAID; 'I KNOW;' BUT DID NOT START THE TURN TO FINAL. AT THAT POINT I SAID; 'I HAVE THE CTLS' AND TOOK THE CTLS AND STARTED THE TURN TO FINAL. WE ACTUALLY CROSSED INTO THE FINAL APCH COURSE OF RWY 26 BUT DIDN'T RECEIVE ANY TFC ALERTS OR ADVISEMENT FROM ATC. I CORRECTED BACK AND LANDED ON RWY 25L WITHOUT INCIDENT. AFTER TALKING TO THE FO HE SAID THAT HE WAS CONFUSED AND MISTAKENLY THOUGHT THAT RWY 26 WAS THE RWY IN WHICH WE WERE TO LAND. HE HAS VERY LOW TIME IN THE ACFT AND NOT VERY MUCH TIME IN THE AIRLINE ENVIRONMENT. THIS WAS THE PRIMARY FACTOR IN THIS SIT.