Adverse Yaw can be described as an aircraft that has a tendency to skid nose high into a turn. It is noticeable on the ground if you have problems in keeping the nose pointed in the direction you
desire to fly.  It is very common in high wing aircraft , and creates problems for the novice that has yet mastered rudder control. Long wings and lots of dihedral only aggrevate the situation.
Adverse yaw tends to turn the plane away fromthe intended direction. For the high-wing type planes, we need to change to a non-symmetrical system when you set up the aileron throws..
Specifically, we want the ailerons to move UP considerably more than they move DOWN. Doing this will create more drag on the lower (inside) wing in a turn, tending to yaw the plane INTO the turn, and curing the adverse yaw problem!