Theoretical Approaches to Development 2026: What are the theories of human development? Comprehensive information on the contributions of key psychologists.
Theoretical Approaches to Development 2026: Various psychologists have conducted research on the dimensions of child or individual development and proposed theories based on their own perspectives. The most significant among these are as follows.
Jean Piaget’s Theory of Cognitive Development
- Birth: 1896
- Place of Birth: Neuchâtel, Switzerland.
- Doctorate: Obtained in Zoology from the University of Geneva at the age of 21.
Background of the Theory of Cognitive Development
Piaget was intrigued by how a child, who is unable to answer certain questions at a young age, becomes capable of answering them as they grow older. To explore this, he established his own institute for the study of children in Geneva and conducted a comprehensive study on the development of intelligence, using his own two children as subjects. The answers he found to various questions during this process led to the formulation of his theory of cognitive development.
Argument
Piaget posits in his theory that cognitive development begins at birth and proceeds sequentially through various stages. He has categorized this development into four stages. They are:
Stages – Duration
- Sensorimotor stage – Birth to 2 years
- Pre-operational stage – 2 to 7 years
- Concrete operational stage – 7 to 11 years
- Formal operational stage – 11 years and above
In his theory of cognitive development, Piaget stated that intellectual development occurs through certain fundamental concepts. Some of these key concepts include ‘Schema’ and ‘Adaptation’.
Schema: The initial change in cognitive development begins with the schema.
Examples:
- An infant responding with a smile to a mother’s first touch.
- Playing by rolling a ball.
- Squeezing a doll to make it produce a sound, etc.
Such behaviors are referred to as ‘schemas’.
Adaptation: A schema does not remain static; it undergoes modification through interaction with the environment. Piaget uses the term ‘adaptation’ to describe this change. This adaptation occurs through two complementary processes:
- Assimilation
- Accommodation
1. Assimilation
Assimilation is the process of incorporating concepts and experiences into the existing structure of knowledge and subsequently using them in future situations. It represents a child’s capacity to comprehend objects or concepts.
Examples:
- Initially, a child recognizes the mother simply as the person who breastfeeds; later, the child comes to perceive her specifically as “my mother.”
- A child first learns to hold a spoon. Subsequently, the child demonstrates this internalized understanding when grasping other long, slender objects such as pencils, pens, or sticks.
2. Accommodation
When a child needs to learn a new and complex behavior, they must modify their existing behavior; this process is known as accommodation.
Example:
- A child who has internalized the behavior of grasping thin objects like pencils, pens, or sticks must modify this action—specifically by widening their hand—when learning to grasp a ball.
The processes of assimilation (internalizing) and accommodation (modifying) occur across all four stages of Piaget’s cognitive development. They help the child progress from one stage to the next.
1. Sensory-Motor Period (Duration: Birth to 2 years)
The interaction between sensory perceptions and motor activities observed during a child’s first two years is known as the sensory-motor stage.
Characteristics
- A period where sensory experience holds great importance.
- The child gradually learns about their own actions and the impact these actions have on the environment; e.g., expressing hunger by crying.
- The child grows while asserting their existence; e.g., drinking milk, squealing, crying, etc.
2. Preoperational Period (Duration: 2 to 7 years)
During this stage, the child progresses by consolidating the various types of information and experiences they acquire and forming a self-concept. This is known as the preoperational stage. In this period, the child attempts to solve complex problems using mental representations.
Characteristics
- The child gains command over language.
- An egocentric tendency is observed in the child; for example, believing the world exists solely for them and failing to acknowledge others’ perspectives.
- Several key concepts develop in the child during this stage.
Examples
- Deferred Imitation: Observing the activities of parents and attempting to mimic them in their absence. Examples: Writing, watching TV, or trying to use a phone.
- Symbolic Play: The child engages in symbolic play. Examples: Using a stick to represent a horse while playing, or engaging in games like “playing house” (marriage or cooking games).
- Drawing Ability: Children show a keen interest in drawing. Examples: Attempting to draw on house walls, the floor, and paper.
- Creative and Imaginative Ability: During this period, children engage in various creative activities driven by the power of their imagination. E.g., crafting clay carts, pith carts, oxen, cloth dolls, etc.
3. Concrete Operational Period (Duration: 7 to 11 years)
During this stage, a child’s operational abilities develop very rapidly and effectively. However, since this development is limited to concrete experiences, it is known as the ‘concrete operational stage.’ At this stage, the child begins to engage in logical thinking.
Characteristics
- The child learns to write and uses words and numbers.
- A sense of social awareness begins to emerge.
- Egocentric tendencies diminish, and the child begins to acknowledge the opinions of others.
- The child learns by observing objects from various perspectives.
- The child understands relational terms and uses them appropriately according to the context.
- The child comprehends concrete situations and makes decisions based on them.
4. Formal Operational Period (Age: 11 years and above)
At this stage, children possess the ability to solve problems based on their own reasoning power.
The development of abstract thinking and problem-solving capabilities is evident at this stage.
Characteristics
- The child acquires the ability to think logically about a problem and hypothesize a solution.
- Stability in IQ (Intelligence Quotient) is observed at this stage.
- The ability to think mentally—without the aid of external objects—develops.
- A clear attitude regarding social ethics is formed.
- The child gains an awareness of the future and their own ideals.
- The child engages in hypothesizing about actions and conducting self-initiated experiments.
- The child possesses the ability to view any problem from various perspectives.
- At this stage, children are capable of making decisions and critically evaluating their validity.
These four stages of cognitive development proposed by Piaget unfold sequentially in a spiral-like manner. These four stages are interdependent.
Bruner’s Perspective on Cognitive Development
- Birth: Born in New York in 1915.
- Ph.D.: Obtained a Ph.D. in Psychology from Harvard University in 1941.
Bruner’s Famous Argument
“Any subject can be taught effectively in some intellectually honest form to any child at any stage of development.” Based on this principle, Bruner formulated his theory of cognitive development.
Stages of Cognitive Development Proposed by Bruner
According to Bruner, we acquire knowledge through three modes:
- By doing
- Through sensory experiences
- Through internal representation.
Proposing these as stages of cognitive development, Bruner describes the cognitive growth that occurs from birth up to the age of eight in three distinct stages.
Stages – Duration
- Enactive representation – Birth to 3 years
- Iconic representation – 3 years to 7 years
- Symbolic representation – After 7 or 8 years
1. Enactive (Period: Birth to 3 years)
At this stage, the child understands concepts through action rather than through language. The child acquires knowledge by mentally transforming sensory experiences and interacting with the environment. Learning occurs through action here. Examples: learning to ride a bicycle, counting objects to grasp the concept of numbers, etc.
2. Iconic (Period: 3 to 7 years)
At this stage, the child begins to understand concepts through their own symbols. During this period, symbols—such as words, numbers, objects, actions, and events—are used to represent reality. The child develops the ability to categorize various objects and events into different groups.
Although the three modes mentioned above appear in children at different ages, after the age of eight, all three function together.
Educational Implications of Bruner’s Cognitive Development Theory
- Abstract concepts can be taught more quickly by using numerous examples during instruction.
- Students should be prepared to acquire knowledge by fostering in them the habits of reading, listening, and following instructions.
- Cognitive development explains the growth of knowledge in students.
- The language used by teachers should be easily understood by everyone.
- Knowledge should be imparted to children through appropriate activities.
