Spoilers are devices on top of the wing that kill lift by breaking the continuity of the top wing skin. If they are near the thick point of the airfoil, they act very non-proportionally. That is, the effect is either being "on" or "off", even if not extended all the way. This is because as soon as they are deployed a bit, the air over the wing behiind them is separated. So most of the effect occurs as soon as they are extended just a bit.

Move spoilers back towards the trailing edge and they get a much more proprtional effect, because the amount of air they desturb is more proportional to the amount of deflection.

The term spoilerons can apply to any surface that combines spoiler effect and roll control. In the RC world, it's most commonly used to describe ailerons that deflect upwards like spoilers. However, spoilers that deflect defferently on each side for roll control are also spoilerons.

AS for pitch change with spoilers & spoilerons; The pitch change is caused by the combined effects of two things. The pitch change of the wing airfoil caused by the deflection and the effect of the change in airflow angle that's hitting the tail. If ailerons are deflected up - spoileron style, you will get a pitch-up tendency. This is bacause they effect the pitching moment of the wing, but being outboard they do not effect the air going over the tail. If you deflect spoilers that are inboard, like on a glider, you will often get a pitch down. That is because the spoilers are often ahead of the horizontal tail, and since they disturb the air going over the wing, that wing is no longer directing air at a downward angle relative to the tail. Less downforce on the tail means the tail goes up, nose goes down. Xombinations of ailerons that continue inboard or spoilers that are closer to the TE will give combined results...