Flaperons (as functioning in the place of flaps) tend to increase lift--thus allowing the plane to fly more stable at lower airspeeds. This usually tends to pitch the nose of the plane up when deployed, therefore most people will mix a little down elevator with their flaps or flaperons. Spoilers, on the other hand, are designed to kill lift, and should therefore tend to pitch the nose down. Up elevator would be needed to maintain level flight. Of course, some planes are different. I've seen planes that pitch down severely when flaps are deployed. It depends upon the design. But, as a general rule, flaps--nose pitch up.