Step 6. The instructor explains the numbering system. Larger numbers indicate better dexterity, more upright posture, darker skin color, larger brain size, good social behavior. A player whose traits in- cluded manual dexterity-2, posture-4, skin color-5, brain size-5, social behavior-1 would be an intelligent, dark-skinned individual with upright posture and poor social and dexterity skills.