The extent of a particular child's resilience seems to depend in part on his or her temperament (the biologically-determined aspect of personality that helps shape responses to events in the environment). Temperamental characteristics exist and have some consistency from birth onward, and these characteristics help to determine how a child or a young person reacts to both good and bad experiences. This has a strong bearing on how young people function within relationships and participate in developmentally significant activities such as school, sport and work.