This document summarizes research on prosocial behavior and factors that influence helping others. It discusses key concepts like altruism, heroism, bystander effect, and diffusion of responsibility. Several studies are described that explore how the number of bystanders, mood, personality traits like empathy, and situational factors can impact whether someone helps in an emergency situation. The document also examines motivations for prosocial acts and long-term volunteering commitments from perspectives of empathy, self-interest, genetic determinism, and other theories.