Discussion

Every one goes through many stages in life beginning at the time of conception, throughout life, and finally in death. Human development is important to psychologists because it can provide insight about a person and the stage he or she may be experiencing in life based on age-related changes in behavior, emotions, personality, and thought processes (Boyd & Bee, 2009). The interest of changes throughout a person's life, from childhood through adulthood, has developed into a psychological area of study called the lifespan perspective. This modern perspective believes that interdisciplinary research is important in the understanding of lifespan development as well as understanding that each individual, of all ages, can change and develop through many different contexts (Boyd & Bee, 2009).

The following stages, according to Annenberg Media Learner (2010), start at birth. Although Boyd & Bee (2010) state that prenatal is the very first stage of development. While...
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