Stages of Development Sensorimotor (birth until 2 years)

1. Stages of DevelopmentSensorimotor(birth until 2 years) • Recognizes self as agent of action and begins to act intentionally • Differentiates self from objects • Begins to differentiate sensory and motor actions, initially reflexes, by means of accommodation and coordinates them to form adaptive ways of acting on the environment - Bukakto & Daehler, 2001 • Organizes responses to objects into complex activities such as hand-eye coordination, knowledge of space and objects, and eventually rudimentary symbols designed to solve problems and understand the physical world - Bukakto & Daehler, 2001

2. Stages of DevelopmentSensorimotor(birth until 2 years) • The Sensorimotor Stage is divided into six subcategories: • Simple reflexes: From birth to one month old. At this time infants use reflexes such as rooting and sucking. • First habits and primary circular reactions: From one month to four months old. During this time infants learn to coordinate sensation and two types of schema (habit and circular reactions). A primary circular reaction is when the infant tries to reproduce an event that happened by accident (ex.: sucking thumb). • Secondary circular reactions: From four to eight months old. At this time they become aware of things beyond their own body; they are more object-oriented. At this time they might accidentally shake a rattle and continue to do it for sake of satisfaction. • Coordination of secondary circular reactions:From eight months to twelve months old. During this stage they can do things intentionally. They can now combine and recombine schemata and try to reach a goal (ex.: use a stick to reach something). They also understand object permanence at this stage. That is, they understand that objects continue to exist even when they can't see them. • Tertiary circular reactions, novelty, and curiosity: From twelve months old to eighteen months old. During this stage infants explore new possibilities of objects; they try different things to get different results. • Coordination of tertiary circular reactions: From eighteen to twenty-four months. Internalization of behaviors and development of mental symbols.