Bullying is a distinctive pattern of repeatedly and deliberately harming and humiliating others, specifically those who are smaller, weaker, younger or in any way more vulnerable than the bully. The deliberate targeting of those of lesser power is what distinguishes bullying from garden-variety aggression.| Psychology Today
Guilt is aversive and—like shame, embarrassment, or pride—has been described as a self-conscious emotion, involving reflection on oneself. People may feel guilt for a variety of reasons, including acts they have committed (or think that they committed), a failure to do something they should have done, or thoughts that they think are morally wrong.| Psychology Today
Empathy is the ability to recognize, understand, and share the thoughts and feelings of another person, animal, or fictional character. Developing empathy is crucial for establishing relationships and behaving compassionately. It involves experiencing another person’s point of view, rather than just one’s own, and enables prosocial or helping behaviors that come from within, rather than being forced.| Psychology Today
Adolescence is the transitional stage from childhood to adulthood that occurs between ages 13 and 19. The physical and psychological changes that take place in adolescence often start earlier, during the preteen or "tween" years: between ages 9 and 12.| Psychology Today
A bias is a tendency, inclination, or prejudice toward or against something or someone. Some biases are positive and helpful—like choosing to only eat foods that are considered healthy or staying away from someone who has knowingly caused harm. But biases are often based on stereotypes, rather than actual knowledge of an individual or circumstance. Whether positive or negative, such cognitive shortcuts can result in prejudgments that lead to rash decisions or discriminatory practices.| Psychology Today