The average newborn infant weighs 3.4 kg (7.5 pounds) and is about 51 cm (20 inches) long. During each stage, the person experiences a psychosocial crisis which could have a positive or negative outcome for personality development. Infancy is a Plateau in Development. Stages of Psychosocial Development. The theory of childhood cognitive development developed by the Swiss psychology Jean Piaget describes four stages of increasingly complex and abstract thought that occur between birth and adolescence, each qualitatively different from but dependent upon the stages before it. Ego Development Outcome: Trust vs. Mistrust. The third sub-stage, the secondary circular reactions phase, occurs from four to nine months and is associated primarily with the development of coordination between vision and prehension. During each stage, people are faced with a developmental conflict … During the first year of your child's life, she will go from a naive newborn who has little motor control to an on-the-verge-of-toddling baby. Middle and Late Childhood (6 to 12 years) 5. Stages and Strands of Development by Lorna Stevenson 1. These stages refer to how a child begins to think and mentally process the world, and the first two stages make up infancy and early childhood development. Physical Development: Age 0–2 Physical development refers to biological changes that children undergo as they age. His eight-stage theory of human development described this process from infancy through death. Infancy is the first stage of development for children and covers the child during prenatal care and up to 1 year old. The National Network for Childcare lists several developmental milestones that occur during the first year of life 1 2.The first year is a period of rapid development for motor, language, social, sensory and thinking skills. It is the time that the fetus must adjust to life outside the uterine walls of the mother after approximately nine months. Stages of Emotional Development Infancy, ... s account of oral, anal, and genital stages of development were suffused ... a therapist near you–a FREE service from Psychology Today. Infancy, Childhood, Adolescence, Adult and Older Adult. Learn more about infancy in this article. Late Adulthood (61 years and above) 2. Psychology Encyclopedia Child Development. ADVERTISEMENTS: This article throws light upon the four important stages of human development. Jamie has so far not had healthy development due to negative life experiences, and requires support to rectify this and improve his life chances in the future. But understanding these stages of development may also remind us to live our life to the fullest.   The rapid growth and development which took place during the prenatal period suddenly come to a stop with birth. Human Development: Stage # 1. 1. Psychosocial Stage 1 - Trust vs. Mistrust • The first stage of Erikson’s theory of psychosocial development occurs between birth and one year of age and is the most fundamental stage in life. Erikson also referred to infancy as the Oral Sensory Stage (as anyone might who watches a baby put everything in her mouth) where the major emphasis is on the mother's positive and loving The three goals of developmental psychology are to describe, explain, and to optimize development (Baltes, Reese, & Lipsitt, 1980). We will discover how relationships during infancy continue to shape our personalities and affect our intimate relationships, our parenting styles and even our work style as adults. 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