Stages of Development and Cognitive Development Theories

Voyage through the Lifespan Part 2

Stages of Development

• Development occurs across several key stages:

  • Prenatal

  • Infancy

  • Childhood

  • Adolescence

  • Adulthood

Jean Piaget

• Jean Piaget is recognized as one of the most influential developmental psychologists.

• He proposed a framework for understanding cognitive development that advances through four stages.

• Piaget's theory posits that children develop new cognitive schemes as they grow, which are ways of thinking that stem from personal experiences.

Piaget's Stages of Cognitive Development

1. Sensorimotor Stage

2. Preoperational Stage

3. Concrete Operational Stage

4. Formal Operational Stage

Piagetian Theory: Sources of Discontinuity

• The framework underscores distinct transitions between the stages as follows:

  1. Sensorimotor Stage (Birth to 2 Years)

  • Infants construct their understanding of the world by coordinating sensory experiences with physical actions.

  • Progression from reflexive, instinctual actions at birth to the onset of symbolic thought toward the end of this stage.

  1. Preoperational Stage (2 to 7 Years)

  • Children begin representing the world with words and images, reflecting increased symbolic thinking that outstrips mere sensory/physical actions.

  1. Concrete Operational Stage (7 to 11 Years)

  • Children can logically reason about concrete events and classify objects into distinct sets.

  1. Formal Operational Stage (11 Years to Adulthood)

  • Adolescents can reason in abstract, idealistic, and logical ways.

Detailed Stages of Development

Stage 1: Sensorimotor (Birth - 2 Years)

• Nature of Learning:

  • Information is acquired mainly through senses and motor activities.

  • Infants differentiate themselves from objects.

  • They recognize themselves as agents of action, beginning intentional behaviors (e.g., pulling a string to move a mobile, shaking a rattle to produce sound).

• Object Permanence:

  • Definition: Understanding that objects continue to exist even when they cannot be observed. This concept typically develops around 9 months.

• A-not-B Error:

  • A common mistake by infants where they search for an object in the location (A) where they last found it, instead of the current location (B).

Stage 2: Preoperational (2 - 7 Years)

• Cognitive Abilities:

  • Children learn to use language and create representations of objects through images and words.

  • Thinking remains egocentric, making it difficult to see things from others' viewpoints.

• Symbolic Thinking:

  • The merging of language and pretend play enhances cognitive abilities.

• Classification of Objects:

  • Classification can occur based on a single feature (e.g., sorting all red blocks by color, irrespective of shape).

• Conservation of Quantity Errors:

  • A belief that changes in appearance (e.g., liquid poured into a differently shaped container) can alter the quantity.

  • Reasoning often relies on appearances rather than logical principles.

• Egocentrism:

  • Children view the world exclusively through their own experiences, understanding others' emotions but centering their thoughts around their perspectives.

Stage 3: Concrete Operational (7 - 11 Years)

• Logical Thinking:

  • Children can think logically about tangible objects and events.

  • Decrease in egocentrism is noted, enabling consideration of others' perspectives.

• Classifications and Series Orders:

  • Children can classify objects by multiple features and order them along a single dimension (e.g., arranging by size).

• Overcoming Conservation Errors:

  • Acquires the ability to understand that quantity remains the same despite changes in appearance.

Stage 4: Formal Operational (12 Years - Adulthood)

• Critical Thinking:

  • Develops the capability for logical reasoning about abstract propositions and the systematic testing of hypotheses.

  • Concerns can shift toward hypotheticals, future considerations, and ideological dilemmas.

• Abstract Thinking:

  • Integrates the use of deductive logic and abstract reasoning.

Theory of Mind

• Definition: The understanding that other individuals possess mental states and emotions that affect their behaviors.

• Importance: This ability allows for predictions about other people's responses.

• Empathy: The capacity to recognize and understand another’s emotional state; linked with activity in the frontal lobe.

Morality

• Moral Reasoning:

  • Derived from cognitive processing, determining what is considered moral behavior.

• Moral Emotions:

  • Tied to broader societal interests; encourages altruism through feelings like shame, guilt, and embarrassment.

• Inequity Aversion:

  • A fundamental preference for fairness; individuals generally dislike outcomes perceived as unfair when making decisions.

Case Study: Heinz Dilemma

• Scenario Description:

  • A woman critical condition on her deathbed requires an expensive drug (radium) developed by a local druggist, who charges exorbitantly for it.

  • Her husband, Heinz, attempts to procure the drug but can only gather half the required funds.

  • After being denied a fair arrangement, Heinz breaks into the druggist’s lab to steal the drug.

  • Ethical question posed: Should Heinz have committed theft, and why?

Kohlberg’s Stages of Moral Development

• Preconventional Level:

  • The earliest level where moral judgments derive from self-interest and outcomes.

  • Example evaluation: "He should steal the drug because then he will have it."

• Conventional Level:

  • The middle level governed by strict adherence to social conventions and the desire for approval.

  • Example evaluation: "He shouldn’t take the drug. You are not supposed to steal, which will make him a bad person."

• Postconventional Level:

  • The highest level where moral decisions hinge on abstract principles and the intrinsic value of life.

  • Example evaluation: "Sometimes laws must be broken if they are unjust. In this case, it's wrong to steal but even worse to unjustly profit from a life-saving drug."