Piaget's theory of cognitive development is a comprehensive theory about the nature and development of human
intelligence first developed by
Jean Piaget. It is primarily known as a
developmental stage theory,
but in fact, it deals with the nature of knowledge itself and how
humans come gradually to acquire it, construct it, and use it. Moreover,
Piaget claims the idea that cognitive development is at the centre of
human organism and language is contingent on cognitive development.
Below, there is first a short description of Piaget's views about the
nature of intelligence and then a description of the stages through
which it develops until maturity.
The Nature of Intelligence: Operative and Figurative Intelligence
Piaget believed that reality is a dynamic system of continuous
change, and as such is defined in reference to the two conditions that
define dynamic systems that change. Specifically, he argued that reality
involves transformations and states. Transformations refer to all
manners of changes that a thing or person can undergo. States refer to
the conditions or the appearances in which things or persons can be
found between transformations. For example, there might be changes in
shape or form (for instance, liquids are reshaped as they are
transferred from one vessel to another, humans change in their
characteristics as they grow older), in size (e.g., a series of coins on
a table might be placed close to each other or far apart) in placement
or location in space and time (e.g., various objects or persons might be
found at one place at one time and at a different place at another
time). Thus, Piaget argued, that if human intelligence is to be
adaptive, it must have functions to represent both the transformational
and the static aspects of reality. He proposed that operative
intelligence is responsible for the representation and manipulation of
the dynamic or transformational aspects of reality and that figurative
intelligence is responsible for the representation of the static aspects
of reality).
[1]
Operative intelligence is the active aspect of intelligence. It
involves all actions, overt or covert, undertaken in order to follow,
recover, or anticipate the transformations of the objects or persons of
interest. Figurative intelligence is the more or less static aspect of
intelligence, involving all means of representation used to retain in
mind the states (i.e., successive forms, shapes, or locations) that
intervene between transformations. That is, it involves perception,
imitation, mental imagery, drawing, and language. Therefore, the
figurative aspects of intelligence derive their meaning from the
operative aspects of intelligence, because states cannot exist
independently of the transformations that interconnect them. Piaget
believed that the figurative or the representational aspects of
intelligence are subservient to its operative and dynamic aspects, and
therefore, that understanding essentially derives from the operative
aspect of intelligence.
At any time, operative intelligence frames how the world is
understood and it changes if understanding is not successful. Piaget
believed that this process of understanding and change involves two
basic functions: Assimilation and accommodation.
Assimilation and Accommodation
Through studying the field of education Piaget focused on
accommodation and assimilation. Assimilation, one of two processes
coined by Jean Piaget, describes how humans perceive and adapt to new
information. It is the process of taking one’s environment and new
information and fitting it into pre-existing cognitive schemas.
Assimilation occurs when humans are faced with new or unfamiliar
information and refer to previously learned information in order to make
sense of it. Accommodation, unlike assimilation is the process of
taking one's environment and new information, and altering one's
pre-existing schemas in order to fit in the new information.
Through a series of stages, Piaget explains the ways in which
characteristics are constructed that lead to specific types of thinking;
this chart is called Cognitive Development. To Piaget, assimilation is
integrating external elements into structures of lives or environments
or those we could have through experience. It is through assimilation
that accommodation is derived. Accommodation is imperative because it is
how people will continue to interpret new concepts, schemas,
frameworks, etc.
[2]
Assimilation is different than accommodation because of how it relates
to the inner organism due to the environment. Piaget believes that the
human brain has been programmed through evolution to bring equilibrium,
and to move upwards in a process to equilibriate what is not. The
equilibrium is what Piaget believes ultimately influences structures
because of the internal and external processes through assimilation and
accommodation.
Piaget's understanding is that these two functions cannot exist
without the other. To assimilate an object into an existing mental
schema, one first needs to take into account or accommodate to the
particularities of this object to a certain extent; for instance, to
recognize (assimilate) an apple as an apple one needs first to focus
(accommodate) on the contour of this object. To do this one needs to
roughly recognize the size of the object. Development increases the
balance or equilibration between these two functions. When in balance
with each other, assimilation and accommodation generate mental schemas
of the operative intelligence. When one function dominates over the
other, they generate representations which belong to figurative
intelligence.
Following from this conception Piaget theorized that intelligence is
active and constructive. It is active in the literal sense of the term
as it depends on the actions (overt or covert, assimilatory or
accommodatory), which the thinker executes in order to build and rebuild
his models of the world. It is also constructive because actions,
particularly mental actions, are coordinated into more inclusive and
cohesive systems, thus they are raised to more stable and effective
levels of functioning.
Sensorimotor stage
The
sensorimotor stage is the first of the four stages in cognitive development which "extends from birth to the acquisition of language".
[3]
"In this stage, infants construct an understanding of the world by
coordinating experiences (such as seeing and hearing) with physical,
motoric actions. Infants gain knowledge of the world from the physical
actions they perform on it. An infant progresses from reflexive,
instinctual action at birth to the beginning of symbolic thought toward
the end of the stage.
Piaget divided the sensorimotor stage into six sub-stages"
[4]:0–2
years, Infants just have senses-vision, hearing, and motor skills, such
as grasping, sucking, and stepping.---from Psychology Study Guide by
Bernstein, Penner, Clarke-Stewart, Roy
| Sub-Stage |
Age |
Description |
| 1 Simple Reflexes |
Birth-6 weeks |
"Coordination of sensation and action through reflexive behaviors".[4] Three primary reflexes are described by Piaget: sucking
of objects in the mouth, following moving or interesting objects with
the eyes, and closing of the hand when an object makes contact with the
palm (palmar grasp).
Over the first six weeks of life, these reflexes begin to become
voluntary actions; for example, the palmar reflex becomes intentional
grasping.[5]). |
| 2 First habits and primary circular reactions phase |
6 weeks-4 months |
"Coordination of sensation and two types of schemes: habits (reflex)
and primary circular reactions (reproduction of an event that initially
occurred by chance). Main focus is still on the infant's body." [4]
As an example of this type of reaction, an infant might repeat the
motion of passing their hand before their face. Also at this phase,
passive reactions, caused by classical or operant conditioning, can begin.[5] |
| 3 Secondary circular reactions phase |
4–8 months |
Development of habits.
"Infants become more object-oriented, moving beyond self-preoccupation;
repeat actions that bring interesting or pleasurable results."[4] This stage is associated primarily with the development of coordination between vision and prehension.
Three new abilities occur at this stage: intentional grasping for a
desired object, secondary circular reactions, and differentiations
between ends and means. At this stage, infants will intentionally grasp
the air in the direction of a desired object, often to the amusement of
friends and family. Secondary circular reactions, or the repetition of
an action involving an external object begin; for example, moving a
switch to turn on a light repeatedly. The differentiation between means
and ends also occurs. This is perhaps one of the most important stages
of a child's growth as it signifies the dawn of logic.[5] |
| 4 Coordination of secondary circular reactions stages |
8–12 months |
"Coordination of vision and touch--hand-eye coordination; coordination of schemes and intentionality." [4]
This stage is associated primarily with the development of logic and
the coordination between means and ends. This is an extremely important
stage of development, holding what Piaget calls the "first proper intelligence." Also, this stage marks the beginning of goal orientation, the deliberate planning of steps to meet an objective.[5] |
| 5 Tertiary circular reactions, novelty, and curiosity |
12–18 months |
"Infants become intrigued by the many properties of objects and by
the many things they can make happen to objects; they experiment with
new behavior." [4]
This stage is associated primarily with the discovery of new means to
meet goals. Piaget describes the child at this juncture as the "young
scientist," conducting pseudo-experiments to discover new methods of
meeting challenges.[5] |
| 6 Internalization of Schemes |
18–24 months |
"Infants develop the ability to use primitive symbols and form enduring mental representations." [4] This stage is associated primarily with the beginnings of insight, or true creativity. This marks the passage into the preoperational stage. |
By the end of the sensorimotor period, objects are both separate from the self and permanent.
Object permanence
is the understanding that objects continue to exist even when they
cannot be seen, heard, or touched. Acquiring the sense of object
permanence is one of the infant's most important accomplishments,
according to
Piaget.
[4]
Preoperational stage
The preoperative stage is the second of four stages of cognitive
development.. Cognitive Development Approaches. By observing sequences
of play, Jean Piaget was able to demonstrate that towards the end of the
second year, a qualitatively new kind of psychological functioning
occurs.
(Pre)Operatory Thought is any procedure for mentally acting on
objects. The hallmark of the preoperational stage is sparse and
logically inadequate mental operations. During this stage, the child
learns to use and to represent objects by images, words, and
drawings.The child is able to form stable concepts as well as mental
reasoning and magical beliefs. The child however is still not able to
perform operations; tasks that the child can do mentally rather than
physically. Thinking is still egocentric. The child has difficulty
taking the viewpoint of others. Two substages can be formed from
preoperative thought.
- The Symbolic Function Substage
- Occurs between about the ages of 2 and 7.During 2-4 years old , kids
cannot yet manipulate and transform information in logical ways, but
they now can think in images and symbols. The child is able to formulate
designs of objects that are not present. Other examples of mental
abilities are language and pretend play. Although there is an
advancement in progress, there are still limitations such as egocentrism
and animism. Egocentrism occurs when a child is unable to distinguish
between their own perspective and that of another person's. Children
tend to pick their own view of what they see rather than the actual view
shown to others.An example is an experiment performed by Piaget and
Barbel Inhelder. Three views of a mountain are shown and the child is
asked what a traveling doll would see at the various angles; the child
picks their own view compared to the actual view of the doll. Animism is
the belief that inanimate objects are capable of actions and have
lifelike qualities. An example is a child believing that the sidewalk
was mad and made them fall down.
- The Intuitive Thought Substage
- Occurs between about the ages of 4 and 7. Children tend to become
very curious and ask many questions; begin the use of primitive
reasoning. There is an emergence in the interest of reasoning and
wanting to know why things are the way they are. Piaget called it the
intuitive substage because children realize they have a vast amount of
knowledge but they are unaware of how they know it.'Centration' and
'conservation' are both involved in preoperative thought. Centration is
the act of focusing all attention on one characteristic compared to the
others. Centration is noticed in conservation; the awareness that
altering a substance's appearance does not change its basic properties.
Children at this stage are unaware of conservation.Example, In Piaget's
most famous task, a child is presented with two identical beakers
containing the same amount of liquid. The child usually notes that the
beakers have the same amount of liquid.When one of the beakers is poured
into a taller and thinner container, children who are typically younger
than 7 or 8 years old say that the two beakers now contain a different
amount of liquid. The child simply focuses on the height and width of
the container compared to the general concept.
Concrete operational stage
The
concrete operational stage is the third of four stages of
cognitive development in Piaget's theory. This stage, which follows the
preoperational stage, occurs between the ages of 7 and 11 years
[6] and is characterized by the appropriate use of logic. Important processes during this stage are:
Seriation—the ability to sort objects in an order according to
size, shape, or any other characteristic. For example, if given
different-shaded objects they may make a color gradient.
Transitivity- The ability to recognize logical relationships
among elements in a serial order, and perform 'transitive inferences'
(for example, If A is taller than B, and B is taller than C, then A must
be taller than C).
Classification—the ability to name and identify sets of
objects according to appearance, size or other characteristic, including
the idea that one set of objects can include another.
Decentering—where the child takes into account multiple
aspects of a problem to solve it. For example, the child will no longer
perceive an exceptionally wide but short cup to contain less than a
normally-wide, taller cup.
Reversibility—the child understands that numbers or objects
can be changed, then returned to their original state. For this reason, a
child will be able to rapidly determine that if 4+4 equals t, t−4 will
equal 4, the original quantity.
Conservation—understanding that quantity, length or number of items is unrelated to the arrangement or appearance of the object or items.
Elimination of Egocentrism—the ability to view things from
another's perspective (even if they think incorrectly). For instance,
show a child a comic in which Jane puts a doll under a box, leaves the
room, and then Melissa moves the doll to a drawer, and Jane comes back. A
child in the concrete operations stage will say that Jane will still
think it's under the box even though the child knows it is in the
drawer. (See also
False-belief task).
Children in this stage can, however, only solve problems that apply
to actual (concrete) objects or events, and not abstract concepts or
hypothetical tasks.
Formal operational stage
The formal operational period is the fourth and final of the periods of cognitive development in Piaget's theory.
[7]
This stage, which follows the Concrete Operational stage, commences at
around 11 years of age (puberty) and continues into adulthood.
[7]
In this stage, individuals move beyond concrete experiences and begin
to think abstractly, reason logically and draw conclusions from the
information available, as well as apply all these processes to
hypothetical situations.
[7]
The abstract quality of the adolescent's thought at the formal
operational level is evident in the adolescent's verbal problem solving
ability.
[7]
The logical quality of the adolescent's thought is when children are
more likely to solve problems in a trial-and-error fashion.
[7] Adolescents begin to think more as a scientist thinks, devising plans to solve problems and systematically testing solutions.
They use hypothetical-deductive reasoning, which means that they
develop hypotheses or best guesses, and systematically deduce, or
conclude, which is the best path to follow in solving the problem.
[]
During this stage the adolescent is able to understand such things as
love, "shades of gray", logical proofs and values. During this stage the
young person begins to entertain possibilities for the future and is
fascinated with what they can be.
Adolescents are changing cognitively also by the way that they think about social matters.
Adolescent Egocentrism governs the way that adolescents think about
social matters and is the heightened self-consciousness in them as they
are which is reflected in their sense of personal uniqueness and
invincibility.
Adolescent egocentrism can be dissected into two types of social thinking,
imaginary audience that involves attention getting behavior, and
personal fable which involves an adolescent's sense of personal uniqueness and invincibility.
The stages and causation
Piaget sees children’s conception of causation as a march from
"primitive" conceptions of cause to those of a more scientific,
rigorous, and mechanical nature. These primitive concepts are
characterized as
magical, with a decidedly nonnatural or nonmechanical tone. Piaget attributes this to his most basic assumption: that babies are
phenomenists. That is, their knowledge "consists of assimilating things to
schemas"
from their own action such that they appear, from the child’s point of
view, "to have qualities which in fact stem from the organism."
Consequently, these "subjective conceptions," so prevalent during
Piaget’s first stage of development, are dashed upon discovering deeper
empirical truths. Piaget gives the example of a child believing the moon
and stars follow him on a night walk; upon learning that such is the
case for his friends, he must separate his self from the object,
resulting in a theory that the moon is immobile, or moves independently
of other
agents. The second stage, from around three to eight years of age, is characterized by a mix of this type of magical,
animistic,
or “nonnatural” conceptions of causation and mechanical or
"naturalisitic" causation. This conjunction of natural and nonnatural
causal explanations supposedly stems from experience itself, though
Piaget does not make much of an attempt to describe the nature of the
differences in conception; in his interviews with children, he asked
specifically about natural phenomena: what makes clouds move? What makes
the stars move? Why do rivers flow? The nature of all the answers
given, Piaget says, are such that these objects must perform their
actions to "fulfill their obligations towards men." He calls this "moral
explanation."
[
Challenges to Piagetian stage theory
Piagetians' accounts of development have been challenged on several
grounds. First, as Piaget himself noted, development does not always
progress in the smooth manner his theory seems to predict. 'Decalage',
or unpredicted gaps in the developmental progression, suggest that the
stage model is at best a useful approximation. More broadly, Piaget's
theory is 'domain general', predicting that cognitive maturation occurs
concurrently across different domains of knowledge (such as
mathematics,
logic, understanding of
physics, of
language,
etc.). During the 1980s and 1990s, cognitive developmentalists were
influenced by "neo-nativist" and evolutionary psychology ideas. These
ideas de-emphasized domain general theories and emphasized
domain specificity or
modularity of mind.
Modularity implies that different cognitive faculties may be largely
independent of one another and thus develop according to quite different
time-tables. In this vein, some cognitive developmentalists argued that
rather than being domain general learners, children come equipped with
domain specific theories, sometimes referred to as 'core knowledge',
which allows them to break into learning within that domain. For
example, even young infants appear to be sensitive to some predictable
regularities in the movement and interactions of objects (e.g. that one
object cannot pass through another), or in human behavior (e.g. that a
hand repeatedly reaching for an object has that object, not just a
particular path of motion), as its be the building block out of which
more elaborate knowledge is constructed. More recent work has strongly
challenged some of the basic presumptions of the 'core knowledge'
school, and revised ideas of domain generality—but from a newer dynamic
systems approach, not from a revised Piagetian perspective. Dynamic
systems approaches harken to modern neuroscientific research that was
not available to Piaget when he was constructing his theory. One
important finding is that domain-specific knowledge is constructed as
children develop and integrate knowledge. This suggests more of a
"smooth integration" of learning and development than either Piaget, or
his neo-nativist critics, had envisioned. Additionally, some
psychologists, such as
Vygotsky and
Jerome Bruner, thought differently from Piaget, suggesting that language was more