MMR vaccine. The MMR vaccine contains vaccines that protect against three viral infections: measles, mumps and rubella. It is given as a series of two doses at 12 to 15 months of age and at 4 to 6 years of age.ubella is a viral infection also known as German measles. Rubella infection of children causes a mild rash on the face, swelling of glands behind the ear, occasionally a short-lived swelling of small joints (like the joints of the hand), and low-grade fever.
Key Concepts. Eriksonâs psychosocial theory of development considers the impact of external factors, parents and society on personality development from childhood to adulthood. According to Eriksonâs theory, every person must pass through a series of eight interrelated stages over the entire life cycle[2]. Basic Trust vs. Mistrust â Hope.
Jean Piaget. The Stages of Cognitive Development. Piaget's four stages of development occur in infancy, preschool, childhood, and adolescence. Each stage is characterized by a general cognitive structure that affects all of the child's thinking. Each stage represents the child's understanding of reality during that period, and each but the last is an inadequate approximation of reality.