Psychology Study Guide: Theories, Brain, and Disorders

Study Guide - Smart Notes

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Erikson's Psychosocial Theory

Overview

Erik Erikson's psychosocial theory describes eight stages of human development, each characterized by a central conflict that must be resolved for healthy psychological growth.

Key Point 1: Each stage involves a psychosocial crisis (e.g., trust vs. mistrust, autonomy vs. shame).
Key Point 2: Successful resolution leads to virtues and strengths; failure may result in psychological difficulties.
Example: In infancy, resolving "trust vs. mistrust" leads to hope and security.

Piaget's Cognitive Theory

Stages of Cognitive Development

Jean Piaget proposed that children progress through four stages of cognitive development, each with distinct ways of thinking and understanding the world.

Key Point 1: Stages: Sensorimotor, Preoperational, Concrete Operational, Formal Operational.
Key Point 2: Children actively construct knowledge through assimilation and accommodation.
Example: In the sensorimotor stage (birth-2 years), infants learn object permanence.

Maslow's Hierarchy of Needs (Humanist Theory)

Hierarchy Structure

Abraham Maslow's hierarchy of needs is a motivational theory in psychology, comprising a five-tier model of human needs, often depicted as a pyramid.

Key Point 1: Needs progress from physiological (basic) to self-actualization (highest).
Key Point 2: Lower needs must be satisfied before higher needs become motivational.
Example: Safety needs (security, stability) must be met before pursuing esteem needs (respect, achievement).

Behavioural Psychology: Classical vs. Operant Conditioning

Learning Mechanisms

Behavioural psychology focuses on observable behaviours and how they are learned through interaction with the environment.

Key Point 1: Classical Conditioning: Learning by association (Pavlov's dogs).
Key Point 2: Operant Conditioning: Learning through consequences (reinforcement and punishment; Skinner).
Example: Classical conditioning: A bell paired with food causes a dog to salivate at the sound. Operant conditioning: A rat presses a lever to receive food.

The Human Brain: Parts & Functions

Major Brain Regions

The human brain is divided into several regions, each responsible for specific functions.

Key Point 1: Cerebrum: Higher cognitive functions, sensory processing, voluntary movement.
Key Point 2: Cerebellum: Coordination and balance.
Key Point 3: Brainstem: Basic life functions (breathing, heart rate).
Example: The frontal lobe is involved in decision-making and problem-solving.

Brain Disorders

Psychiatric and Personality Disorders

Brain disorders can be classified as psychiatric (affecting mood, thought, and behaviour) or personality disorders (affecting patterns of thinking and relating).

Key Point 1: Psychiatric Disorders: Bipolar I & II, Major Depressive Disorder, Schizophrenia, PTSD, Anxiety Disorders.
Key Point 2: Personality Disorders: Narcissistic, Borderline, Antisocial Personality Disorders.
Example: Schizophrenia involves disturbances in thought, perception, and behaviour; Borderline Personality Disorder is marked by instability in relationships and self-image.

Freud's Theory of Personality

Iceberg Model: Levels of Consciousness

Sigmund Freud's model divides the mind into three levels: conscious, preconscious, and unconscious, represented by the iceberg diagram.

Key Point 1: Conscious: Thoughts and feelings we are aware of.
Key Point 2: Preconscious: Memories and knowledge easily brought to awareness.
Key Point 3: Unconscious: Deep-seated drives and memories, not accessible to awareness.
Example: The unconscious influences behaviour through hidden motives and desires.

ID, EGO, SUPEREGO

Freud's structural model of personality consists of three components:

Key Point 1: ID: Primitive, instinctual drives; operates on the pleasure principle.
Key Point 2: EGO: Mediates between ID and reality; operates on the reality principle.
Key Point 3: SUPEREGO: Internalized moral standards; strives for perfection.
Example: The EGO balances the demands of the ID and SUPEREGO to produce socially acceptable behaviour.

Freud's Psychosexual Theory

Stages of Development

Freud proposed five psychosexual stages, each associated with a focus on different erogenous zones.

Key Point 1: Stages: Oral, Anal, Phallic, Latency, Genital.
Key Point 2: Unresolved conflicts can lead to fixation and influence adult personality.
Example: Oral stage (0-1 year): Focus on mouth; fixation may result in oral behaviours (e.g., smoking).

Freudian Defense Mechanisms

Psychological Strategies

Defense mechanisms are unconscious strategies used by the EGO to manage anxiety and conflict.

Key Point 1: Common mechanisms: repression, denial, projection, displacement, rationalization.
Key Point 2: These mechanisms protect the individual from psychological distress.
Example: Repression involves pushing distressing thoughts into the unconscious; projection attributes one's own unacceptable feelings to others.

Comparison Table: Major Psychological Theories

Theory	Main Focus	Key Concepts	Example
Erikson's Psychosocial	Developmental stages	Psychosocial crises	Trust vs. mistrust in infancy
Piaget's Cognitive	Cognitive development	Assimilation, accommodation	Object permanence
Maslow's Hierarchy	Motivation	Needs hierarchy	Self-actualization
Freud's Psychoanalytic	Personality structure	ID, EGO, SUPEREGO	Iceberg model
Behavioural	Learning	Conditioning	Pavlov's dogs, Skinner's box

Additional info:

These topics are directly relevant to college-level psychology courses, covering foundational theories, brain structure, and psychological disorders.
For exam preparation, students should be able to compare theories, identify brain regions and their functions, and recognize symptoms and features of major disorders.