2. phase of pre-operational Thought
This stage is the age range of between 2-7 years. At this stage children begin to paint the world with words and images or symbols. According to Piaget, although pre school kids can symbolically depicts the world, but they still have not been able to carry out "Operation (operation)", i.e. mental actions internalized that lets kids do mentally previously done physically.
This phase difference with the previous stage is "the ability of the child to use the symbol". Use of the symbol for the child at this stage appears in five of the following symptoms:
a. indirect Imitation
Children begin to be able to describe something that is experienced or seen his, which now no longer exist. So thought the child was not limited by time now nor restricted by sensory actions now.
Example: the child can play pie-kuean yourself or play the market-market. This is a result of imitation.
b Symbolic Games.
The symbolic nature of the game is also imitatif, which is the child trying to imitate events that have ever experienced.
Example: girls who play with her dolls, as if her doll is her sister.
c. Drawing
At this stage it is a bridge between symbolic play with the mental picture. Items on the symbolic games lies in terms of "pleasure" in a child's drawing. While her mental picture elements located on "efforts to start imitating something riel".
Example: the child begins to draw something with a pencil or other writing instrument.
d. a Mental picture
The representations of an object or experience thoughts of yesteryear. A mental picture of children at this stage is mostly static. Children still have a systematic error in the lyrics back movement or transformation that he observed.
The example used Piaget is a row of five marbles are white and black.
e. English
Children using voice or language as a representation of objects or events. Through the language children can communicate with others about the events to others.
3. the operating stage of Concrete thinking
This stage is the age range of 7-11 years. this stage is characterized by the development of a system of thought based on the logical rules. The child had developed a logical operation. Important processes during this stage are:
a. Sorting
Namely the ability to sort objects according to size, shape, or other traits. For example, when given a different size objects, they can sort of sleds to the least.
b. Classification
The ability to name and identify sets of objects according to appearance, size or other characteristic, including the idea that a set of objects can include other objects into the circuit. Children no longer have the limitations of logic in the form of animism (the notion that all living things and feel).
c. Decentering
The child begins to consider several aspects of a problem to solve it. For example, the child will no longer consider the wide but short Cup a little more than a small glass of its height.
d. Reversibility
The child begins to understand that the numbers or objects can be modified, then return to the initial state. To that end, children can quickly determine that 4 + 4 equals 8, 8-4 will equal 4, the number of before.
e. Conservation
Understanding that quantity, length or number of items is unrelated to the arrangement or appearance of the object or objects. For example, if the child were given glasses that are the same size and its contents just as much, they would know when the water is poured into a glass that size is different, the water in the glass it will remain just as much with the contents of the glass.
f. egocentrism
The ability to see things from other people's point of view (even when people are thinking the wrong way). For example, the Lala store doll in the box, then leave the room, then move the doll Baim into a drawer, after that, Lala returned to the room. Children in the concrete operations stage will say that Lala would still consider it in the doll's box even though it knew that the doll has been moved into the drawer by the Baim.
4. Formal thought Operation Stage
Formal operational stage is the last period of cognitive development in Piaget's theory. This stage begins to be experienced in child age 11 years and continues into adulthood. The characteristics of this stage is acquired the ability to think abstractly, others are allegorical; logically, and drawing conclusions from the information available.
In this stage, one can understand such things as love, logical proof, and value. Seen from biological factors, this stage occurs when puberty (when the various other major changes), marking its entry into the world of adults is physiological, cognitive, moral reasoning, psikoseksual development, and social development. Some people do not fully reach the development until this stage, so he did not have the thinking skills as an adult and fixed using concrete operational stage of reasoning.
At this stage, adolescents have had the ability to think systematically, i.e. can think of all the possibilities to solve a problem. Example: when the car is blown down, so if the passenger is a child who is still in the stage of concrete thinking operations, he will conclude that the petrol. She just connects so result of one series only. Otherwise on teens who are at the stage of formal thinking, he'll think of some possible causes the car to crash. It could be because businya died, or because of platinanya, etc.
A teenager at this stage already had a high ekuilibrum, so that he can bepikir flexibly and effectively, as well as capable of dealing with complex issues. Teens can think flexible because it can see all the elements and the possibility is there. And teens can think effectively because it can see the thoughts which are suitable for the matter at hand.
D. Implementation Of Piaget's Theory Of Cognitive Development In Learning
In this role, hail an educator is absolutely vital. Some implementations that must be known and applied are as follows:
1. Focus on the process of thought or mental processes are not just on its products. In addition to the truth of the answers students, teachers must understand the process used the child so that the answers to.
2. introduction and recognition of the role of children is important in self initiative and active involvement in the learning kegaiatan. Piaget in the classroom presentation material so (ready made) not given emphasis, and children are encouraged to discover for himself through the spontaneous interaction with the environment.
3. do not put emphasis on practices that are directed to kids like adults in his thinking.
4. acceptance of individual differences in the progress of development, Piaget's theory assumes that all children develop through the same developmental sequence but they acquire it with different speeds.
DAFTAR PUSTAKA
Mukhlis, Hirmaningsih, 2010, Teori Psikologi Perkembangan, Pekanbaru. Penerbit: Psikologi Press
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