3.3 STAGES OF DEVELOPMENT Any development process proceeds through some stages and each development stage differs from the other. Each stage of development has its characteristic. Psychologists have separated human lifespan into stages or periods and identified specific changes that maybe expected during each stage. The transition from one stage to the next is gradual rather than sudden. The age groups assigned to each stage of the development are general as shown in the Table 1.0. Table 1.0 Stages of Development Age Groups (Years) Stage of Development Description of Each Stages Birth to 2 Infancy Neonate: This stage is a period from birth to two weeks. Babyhood: This stage is of rapid growth and development. There are changes in body proportions as well as intellectual growth. 2 to 6 Early childhood This is the preschool period. It is also called the pre-gang age. In this stage, the child seeks gain control over his environment. He also starts to learn to make social adjustment.