B737-700
Flight Crew Last 90 Days 109
Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Human Factors
Flaps set incorrectly for takeoff. New First Officer; getting used to normal cockpit duties and flows; was given last-minute runway and ATIS change during taxi out.  We discussed the changes; reviewed the [computer] changes; programmed the FMS with [computer] changes; reviewed the departure instructions; and were given an immediate takeoff clearance. We ran the Before Takeoff Checklist and I (Captain) ran a reference FATS check (Flaps; Fuel; Altitudes; Trim Settings; Airspeeds set) but failed to set the parking brake and rerun the Before Taxi Checklist as I usually do; and therefore missed reselecting the flaps to position 5.  We proceeded with our takeoff with a flap 1 setting for the previous runway selection; even though the FMC was programmed with flap 5 speeds.As Captain; I knew the new First Officer (FO) was burdened with a lot of last-minute changes and should have set the parking brake to allow time to complete the previous checklist.  Rushing has no favorable outcome. The flaps position could be rechecked on another pre-takeoff checklist if our airline would put it there. Selecting the flaps position prior to the taxi off the gate and never rechecking this critical setting always seemed strange to me.  This is not an excuse; however; for my errors as I should have stopped the jet on the taxiway or cancelled takeoff clearance to rerun the Before Taxi Checklist; which are my normal triggers for checking flap settings on the [computer]. Additive factors were: slight fatigue first flight of the day after a loud night at the hotel with Spring Break parties; the FO being new has no triggers to recheck the flap settings; and even my own trigger; the FATS check; which showed flaps set to something other than up; and the takeoff warning horn not sounding on the thrust lever burst during taxi checks.
Due to second ATIS request; I failed to have the takeoff INIT page up on my FMS when showing the Captain the [computer] to review the takeoff numbers. Thankfully; speeds only differed by one to two knots and stopping margin went from approximately 2;100 feet to 2;000 feet. I didn't realize the error until calling. 'set speed; flaps 1; climb thrust.'
A B737-700 flight crew reported they took off with flaps set incorrectly after a late change to departure runway.