n what Piaget calls equilibrium. As we use our adaptation and organization we constantly get things to fit together. There are other biological functions that also help in Speech development. Normal growth of a person helps a person to adapt and perceive things better. Social interaction is also a biotic factor in Speech development. Humans use other humans to check their own schemas with others. We learn to use others thought relationships to help them fit their schemas together better. Piaget used the two biological tendencies and other biological functions of humans to come up with four stages of Speech development. Piaget said that each developing human must go through each stage in order. The first stage is the sensory-motor stage. The approximate age of the humans in this stage is birth to 2 years. Piaget says that children learn through manipulating concrete materials. Halfway through this stage the child has the ability to know that when an object leaves their view they don’t cease to exist they still are part of the physical world. This is the concept of object permanence. It also allows the child to hold a concept in their mind. The Second stage of Piaget’s Speech development is the pre-operational stage. This stage occurs from 2 - 7 years of age and in it children master many symbols and concrete concepts. In this stage the child is also very egocentric. They have a hard time looking at more than one characteristic of the object their experiencing. In the third stage called the concrete-operational stage, children age 7- 11 start to think logically, learn about the law of conservation, and serial ordering. Conservation is the concept that matter is always the same despite the change in shape of an object. Serial ordering is being able to recognize that things can be put in order. The forth and final stage is the formal-operational stage. From age 12 to adult, learners are able to think abstractly ab...
