Developmental theory According to Earnest Jones 4 Human development stages are- Infancy(birth to 5 yr) Childhood (5 to 12) Adolescence (12-18) Maturity/ Adulthood (18 To Next Yr) Piaget theory of cognitive/Intellectual development: He suggested four developmental stages- Sensory Motor stage (from birth to 2 yr) Pre-operational stage (2 to 7 yr) Concrete-operational stage ( 7 to 11) Formal operational stage ( 11 to above) Others developmental theory: Freud Psycho-analysis theory, Eriction’s theory of psychosocial development, kholberg Moral Development theory. Piaget theory of cognitive/Intellectual development: first try to understand the major theoretical premises on which the theory stand- Piaget theoretical notions: Piaget design a proper framework to understand the structure and functioning and development of the cognitive network of the human mind. He postulated that like physical organs of the human body there are two aspect of the human mind: one is referred to as cognitive structure and the other as cognitive functioning. Cognitive structure: unlike other creatures, the human baby is born with a few practical instincts and reflexes such as looking, racing and grasping. Therefore the initial cognitive structure of Infant is supposed to incorporate only those cognitive abilities or potential which help them to do such acts such as look, reach out or grasp. Piagets named these abilities or potentials as schemas. Cognitive functioning: The structure of an organism is said to play a decisive role in its functioning. Therefore, what is available to an individual in terms of his schemas decides how he is going to respond to the stimuli present in his physical or social environment. On the other hand the individual has to adapt to his environment for survival as well as proper growth and development. The key to his cognitive development thus lies in his constant interaction with an adaptation to his physical and social environment. The tasks of such adaptation is carried out through the process of assimilation and accommodation In this way piaget highlighted the role of the following factors in one's cognitive make up and its functioning: The biologically inherited reflexes and mental dispositions as the fundamental cognitive structure. The changes and development brought about in the cognitive structure through maturation (i.e the process of natural growth) The changes and development in the cognitive structure brought about through experiences (interaction with the physical and social environment) involving the process of assimilation, accommodation and equilibration. 4 Stages of intellectual Development: Sensory Motor stage (from birth to 2 yr): Piaget called the first stage of intellectual development the sensori-motor stage because it is characterized by the absence of language and it is limited to direct sensory and motor interaction with the environment. Characteristics of Sensory Motor Stage: Reflex action ( grasping, Sucking)