You know that Susan is a very helpful person. She spends many hours each week volunteering at a local homeless shelter; she donates a lot of money to charities, and she is always the first person to volunteer to organize something when your group of friends wants to get together. According to the research on the altruistic personality, you cannot be sure that Susan would help carry a neighbor's groceries if the situation arose because personality is not necessarily the most reliable predictor of prosocial behavior.
Prosocial behavior is a voluntary behavior in which an individual is concerned with the rights, feelings, and welfare of others. Prosocial behavior can be expressed for various reasons such as moral reasons and selfish reasons. Prosocial behavior include giving donation to others , helping others, co-operating, providing comfort to others, complying to socially accepted behaviors and adhering to rules.