Moths exhibit a tendency to circle artificial lights repeatedly.

They exhibit a tendency to show self-discipline, act dutifully, and aim for achievement; they display planned rather than spontaneous behavior; and they are generally organized and dependable.

Explanations for why the lower middle class exhibits this tendency have yet to be fully explored.

Impulsivity and compulsivity are interrelated in that each exhibits a tendency to act prematurely or without considered thought and often include negative outcomes.

Other problems noted during initial testing were stiff and erratic rudder control while the ailerons exhibited a tendency to roll in directions opposite to that of rudder control.