Establishing Psychology as a Discipline: Systems & Theories Study Notes

Establishing Psychology as a Discipline: Module 1

Defining Psychology

Psychology is formally defined as the scientific study of the mind and behavior. The etymology of the word is derived from two specific Greek words:

  • Psyche: Meaning "soul" or "life."
  • Logos: Meaning "knowledge," "explanation," or "study."

Historically, this translated to "the study of the soul," but modern definitions focus on the science of behavior and cognitive processes.

American Psychological Association (APA) Definition

According to the APA: "Psychology is the study of the mind and behavior. The discipline embraces all aspects of the human experience — from the functions of the brain to the actions of nations, from child development to care for the aged. In every conceivable setting from scientific research centers to mental health care services, 'the understanding of behavior' is the enterprise of psychologists."

Psychology as a Science

To be classified as a scientific discipline, psychology relies on four fundamental pillars:

  1. Accuracy: Maintaining precision in the collection and interpretation of data.
  2. Objectivity: Evaluating information without bias or personal prejudice.
  3. Skepticism: Maintaining a critical eye and requiring evidence before accepting claims.
  4. Open-mindedness: Willingness to change one's views in the face of new, conflicting evidence.

Historical Foundations and Ancient Roots

Philosophical Contributions
  • René Descartes (Dualism): Descartes proposed that the mind and body are distinct entities. He hypothesized that they interact through the pineal gland, located deep within the brain.
  • Interactionism: A view held by various philosophers suggesting that the mind can influence the body and the body can influence the mind.
Physiologists and the Transition to Science

During the mid-to-late 19th century, several physiologists laid the groundwork for psychological science:

  1. Johannes Müller (1860–1880): Described how electrical signals are conducted by nerves within the body.
  2. Hermann von Helmholtz: Demonstrated how receptors in the eyes and ears receive and interpret sensations from the external world.
  3. Gustav Fechner: Proved that human perceptions of physical stimuli (such as the loudness of a sound or the brightness of a light) are related in lawful, predictable ways to physical energies.

The Birth of Modern Psychology

Psychology gained recognition as a distinct scientific discipline in the late 19th century through the following milestones:

  • 1879: Wilhelm Wundt established the first laboratory dedicated to psychology.
  • 1883: G. Stanley Hall founded the first laboratory of psychology in the United States at Johns Hopkins University.
  • 1892: G. Stanley Hall founded the American Psychological Association (APA) and became its first president.

Early Schools of Thought: Structuralism vs. Functionalism

Structuralism
  • Founders: Wilhelm Wundt and Edward Titchener.
  • Core Focus: Investigating the "structure" of the mind.
  • Methodology: Used introspection (looking inward to examine one's own conscious experience).
Functionalism
  • Founder: William James.
  • Core Focus: Emphasized the functions and purposes of the mind and behavior rather than just the structure.
Contextual Application: Experimental Engineering and Vibration

In a related experimental context (Integrated Coursework: Dynamic Vibration Absorber), the concept of "function" and "structure" is applied to mechanical systems.

  • Resonance: When a system is excited at or near its natural frequencies (nn degree-of-freedom systems have nn natural frequencies), it results in large amplitudes of vibration.
  • Vibration Absorbers: A damping mechanism attached to a primary structure to reduce resonant vibration by adjusting the mass and stiffness of the system.

Major Theoretical Movements

Behaviorism (1913)

Founded by John B. Watson, behaviorism shifted the focus of psychology from internal mental processes to observable behavior.

  • Key Figures: John B. Watson, B.F. Skinner, and Ivan Pavlov.
  • Pavlov’s Dogs: Investigated Classical Conditioning.
  • Skinner’s Operant Conditioning: Focused on how consequences (rewards/punishments) shape behavior.
Psychoanalysis

Founded by Sigmund Freud, this theory emphasizes the power of the unconscious mind in shaping personality and behavior.

  • Psychosexual Stages: A developmental theory spanning from the oral to genital stages.
  • Defense Mechanisms: Concepts like repression and projection used to manage internal conflict.
  • Structural Model: Exploration of the Id, Ego, and Superego.
Humanistic Psychology

Often called the "Third Force," it emerged as a reaction to behaviorism and psychoanalysis. It claims humans have free will and a natural desire to grow.

  • Key Figures: Carl Rogers and Abraham Maslow.
  • Concepts: Self-actualization and client-centered therapy.
Cognitive Revolution (1950s–1960s)

A paradigm shift that returned focus to internal mental processes.

  • 1952: Jean Piaget’s theory on cognitive development gained prominence.
  • 1957: Noam Chomsky’s work on language acquisition.
  • 1960s: Expansion into memory, problem-solving, and the development of computer-based models of the mind.

Comprehensive Timeline of Psychology

  • 1860–1880: Early physiological studies by Müller and others.
  • 1879: Wundt establishes the first lab.
  • 1890: William James publishes Principles of Psychology.
  • 1892: G. Stanley Hall founds the APA.
  • 1904: Ivan Pavlov studies conditioning.
  • 1905: Mary Calkins is elected the first woman president of the APA.
  • 1913: Watson publishes the call for behaviorism.
  • 1933: Freud publishes New Introductory Lectures on Psychoanalysis.
  • 1951: Carl Rogers helps start the humanistic movement.
  • 1953: B. F. Skinner publishes Science and Human Behavior, establishing radical behaviorism.
  • 1968: Atkinson & Shiffrin publish their model of memory, marking a peak in the cognitive revolution.
  • 1980s–1990s: Development of techniques for imaging activity in the brains of awake individuals.

Cognitivism and Information Processing

Cognitivism views learning as an internal process involving understanding, motivation, and retention.

  • Core Belief: Human behavior is understood by how people think; mental processes are the primary subject of study.
  • Internal Events: Includes thinking, memory, perception, intentions, and emotions.
  • Schema: Information is organized in the mind into sections or groups called schemas.
  • Key Theorists: Piaget, Bruner, and Ausubel (Information Processing Theory).

Current Theoretical Perspectives

Psychodynamic Perspective
  • Focus: The unconscious mind and early childhood traumas.
  • Approach: Psychodynamic therapy (talk therapy) to connect the unconscious with current emotions and actions. Used for depression, anxiety, and eating disorders.
Behavioral Perspective
  • Focus: Learned behaviors acquired via environment and external stimuli.
  • Approach: Action-oriented and proactive. It focuses on changing reactions to stressors rather than talking about emotions. Most effective for Phobias, ADHD, OCD, and substance abuse.
Cognitive Perspective
  • Focus: Memory, thinking, language, and decision-making.
  • Intervention: Cognitive Behavioral Therapy (CBT), which is effective for depression, bipolar disorder, and insomnia.
Biological Perspective
  • Other Names: Biopsychology or physiological psychology.
  • Focus: Physical and biological bases of behavior (genetics, brain damage, immune system, nervous system).
  • Tools: MRI and PET scans.
Evolutionary Perspective
  • Based on: Charles Darwin’s theory of natural selection.
  • Principle: Mental processes exist because they served an evolutionary purpose (survival and reproduction).
  • Example: Extroversion is viewed as an advantage because allies and friends increase survival chances.
Humanistic Perspective
  • Focus: Motivation and the drive to develop personal potential.
  • Critique: Difficult to test using the scientific method.
  • Example: An introvert might be viewed as someone choosing social limits because their needs are better met in smaller groups.
Sociocultural Perspective
  • Focus: Influence of culture and social groups on behavior.
  • Example: A person seeming introverted might actually just be following the social norms of their specific culture.