Final answer:
The Horn effect represents the influence of negative arbitrary biases where a negative trait negatively influences the overall perception of an individual.
Step-by-step explanation:
The influence of negative arbitrary biases is known as the Horn effect. This effect is similar to the halo effect but instead focuses on the negative aspects. When an individual allows a negative trait to color their overall opinion of someone, that is the Horn effect in action. This could lead to unfair treatment and judgment of the person, as the perception is clouded by a negative bias towards a trait or a series of traits, which may not accurately reflect the individual's character in its entirety.