Jean
Piaget has divided the cognitive development of both children and adolescents
in to four main stages. They are sensorimotor (Birth to age2), preoperational
stage (ages 2 to 7), concrete operational stage (ages7 to 11) and formal
operational stage (ages 11 to adulthood).
“He believed that all the children pass through these stages in order to
that no child can skip a stage, although different children pass through the
stages at somewhat different rates”(Salvin, 2000). Piaget believed that all the
children would pass the stages but different children will pass through the
stages at different times. For example a child may not be able to pass through
sensorimotor stage although the baby is three year old. This could be due to many
reasons like diseases.
Sensorimotor stage (birth to Age 2)
Sensorimotor
is the earliest stage in the cognitive development. This stage starts when the
baby is born and normally goes on until the baby is 2 year old. In this stage
the children uses their senses and movement to learn and to explore new things.
“Piaget believed that all the children are born with innate tendency to
interact with and to make sense of their environment” (Salvin, 2000). In this
stage there would be many dramatic changes.
All the babies have an inborn behavior which is called reflexes. For
example if you touch a infants lips or near the baby’s mouth then the baby would
try to suck your finger and if you put your finger on their palm then they
would hold your finger . This is what we call Reflexes. These behaviors are innate
and from this the baby’s first scheme is formed. The children then learned to
use these reflexes and they try to explore new things. This learning happens
mostly unknowingly. However later they learn through more intentionally trial
and error efforts. By the end of this stage the trial and error approach would
be better and would also progress to problem solving.
Preoperational stage (Ages 2 to 7)
Normally
in this stage the children in their pre-school. In this stage the children
develops their ability of using symbols and also to represent objects in the
world. Also in this stage the children develop their language and concepts in
an unbelievable rate. “Pre-school children use their symbolic thinking ability
to solve problems but their use of thinking does not follow the convention of
logic and are therefore easily by different perception” (Yunus, Razali
&Jantan, 2001). Earlier Piaget had discovered that young children do not
understand the concept of conservation. “Conservation is the concept that
certain properties of an object (such as weight) remain the same regardless of
changes in other properties (such as length)” (Salvin, 2000). For example if
you pour water in to two jar that is same and ask the child which has more
water than the child would say it is same. However if you pour the same amount of water in to a
jar that is small and wide and a jar that is long and narrow jar and ask the
child which has more water than the child would say that the long and narrow
one has more water. Piaget believed that this happen because the children only
focus on one aspect. In this example the child only focus on the height of the
jar. Another character of the Preoperational children is that the thinking of
the children focuses on the state. In the water example the children forgets
that it is poured from one container to another and then they only focus on the
beginning state that is water in the same type of jars and then the end sate
that is water in a long and narrow jar. The nest character of the
preoperational children is that they are very egocentric. They believe that
everybody thinks the way thinks.
Concrete operational stage (ages 7 to 11)
In
the concrete operational stage the children’s starts to go to school and they
would be in their primary grades.in this stage “They think logically and
concretely, they can solve problems through trial and error” (Yunus, Razali
&Jantan, 2001). In this stage the children could solve problems and also
can form concepts and also can see relationship between things if only the
problems and the objectives are similar or familiar to them. Like the
preoperational stage in this stage also the children’s undergo dramatic changes
in their cognitive development. In this stage the children would not have a
problem in conservation when the children come to this stage they would
understand the concept of conservation. In this stage the kids learn seriation
or in other words arranging things in a logical way. For example arranging
pencil from the smallest to the longest. “Children in elementary grades also
moving from egocentric thought to decentered or objective thought” (Salvin,
2000). In this stage the children’s are not ego centered, the children’s in
this stage has objective thought and they believe that other will not have the
same perceptions that they have.
Formal operational stage (Age 11 to adulthood)
In
this stage the puberty of the students starts and also they develop some of the
adolescent characteristics. “Adolescents are able to think about abstract
hypothetical concepts and are able to think about the long term effects of an
action” (Yunus, Razali &Jantan, 2001). In this stage the children’s think
more abstract and also they could think about what will happen in the future if
they do a certain action. Another ability of the Formal operational stage
children is that they can reason about situations and conditions. They can
apply logic to any to any given conditions. According to Salvin (2000)
according to Piaget, the formal operational stage brings cognitive development
to a close. However the intellectual development will continue to grow beyond
adolescent.