Psychology: Definition and Scope

Understanding Psychology

Psychology is the scientific study of behavior and mental processes. It encompasses both observable actions and internal mental experiences.

• Behavior: Outward or overt actions and reactions that can be seen (e.g., writing notes).

• Mental Processes: Internal, covert activities of the mind that are hidden from direct observation (e.g., thinking, feeling, remembering).

• Inferences about mental processes are often made by observing behavior (e.g., social withdrawal may indicate depression)./

Common psychological disorders:

• Depression

• Anxiety

• Substance abuse

Psychology relies on precise and careful measurement to study these phenomena.

Major Schools and Perspectives in Psychology

Structuralism

Structuralism was the first major school of thought in psychology, focusing on breaking down mental processes into their most basic elements.

• Wilhelm Wundt: Established the first psychology laboratory in Germany, 1879.

• Introspection: Examining and measuring one's own thoughts and mental activities.

• Edward Titchener: Brought structuralism to America.

Functionalism

Functionalism explored how mental activities help an organism adapt to its environment.

• Focused on the purpose of consciousness and behavior.

• Studied how the mind allows people to adapt, live, work, and play.

Gestalt Psychology

Gestalt psychology emphasizes that the whole of anything is greater than its parts. It is especially concerned with perception.

• "Gestalt" means "good figure" in German.

• Focuses on how people naturally organize perceptions according to certain patterns.

Psychoanalysis

Psychoanalysis, founded by Sigmund Freud, emphasizes the influence of the unconscious mind on behavior.

• Unconscious desires and childhood experiences shape behavior.

• Insight therapy is used to treat fear and anxiety.

• Iceberg Analogy: The conscious mind is just the tip, with the unconscious mind beneath the surface.

Behaviorism

Behaviorism focuses on observable behavior that can be seen and measured, emphasizing the role of environmental factors.

• Founded by John B. Watson in the USA.

• Emphasizes experience over genetics.

• Classical conditioning: Learning through association (e.g., Little Albert experiment).

Cognitive Psychology

Cognitive psychology studies mental processes such as perception, learning, memory, thought, and problem solving.

• Focuses on how people process, store, and retrieve information.

Other Perspectives

• Biopsychological: Examines the brain and nervous system.

• Humanistic: Focuses on motivation and personality.

• Evolutionary: Emphasizes survival and adaptation (Darwin's "survival of the fittest").

• Socio-cultural: Studies how groups and society influence individual behavior.

Applications and Specialties in Psychology

Fields of Psychology

• Educational psychology

• Evolutionary psychology

• Industrial/organizational psychology

Mental Health Specialties

• Psychologist: Holds a doctorate (PhD), specializes in research or therapy.

• Psychiatrist: Medical doctor (MD) specializing in diagnosis and treatment, can prescribe medication.

• Psychiatric social worker: Works in social work field, often assists with therapy and support.

Research Methods in Psychology

Goals of Psychology

• Description: What is happening?

• Prediction: Will it happen again?

• Explanation: Why is it happening? (Theory)

• Control: How can it be changed?

Scientific Method Steps

1. Perceiving the question (e.g., causes of depression)

2. Forming a hypothesis (e.g., early parental loss)

3. Testing the hypothesis (e.g., sample correlation between early loss and depression)

4. Drawing conclusions (e.g., statistical significance)

5. Reporting results (e.g., replication of findings)

Descriptive Research Methods

• Naturalistic observation: Observing behavior in its natural environment.

• Laboratory observation: Observing behavior in a controlled environment.

• Case study: In-depth study of one individual or group.

• Surveys: Asking questions about a topic to a representative sample.

Sampling and Variables

• Representative sample: Has the same characteristics as the population, selected randomly.

• Variable: Anything that can change or vary.

• Correlation: Measure of the relationship between two variables.

Correlation direction:

• Positive correlation: Variables move in the same direction.

• Negative correlation: Variables move in opposite directions.

Correlation coefficient: The number indicates strength; the sign indicates direction.

Experimental Research

• Experiment: Deliberate manipulation of a variable to see if changes in behavior result.

• Independent variable (IV): The variable manipulated by the experimenter.

• Dependent variable (DV): The measurable response or behavior of the subjects.

• Operational definition: Precise meaning of a term used to describe a variable.

• Experimental group: Participants exposed to the IV.

• Control group: Participants not exposed to the IV; may receive a placebo.

• Random assignment: Each participant has an equal chance of being in either group.

• Confounding variable: An outside variable that could affect the results (e.g., mood).

Ethics in Psychological Research

• Considerations: Will it harm someone? Is it necessary?

• Belmont Code: Code of conduct for treating people fairly in research.

Table: Seven Major Perspectives in Psychology

Key Terms and Formulas

• Correlation coefficient: (ranges from -1 to +1)

• Operational definition: A specific description of how a variable will be measured.

• Independent variable (IV): The variable manipulated in an experiment.

• Dependent variable (DV): The variable measured in an experiment.

Example Equation

Correlation coefficient formula:

Example: Little Albert Experiment

• A child was conditioned to fear a white rat by pairing it with a loud noise (classical conditioning).

• Demonstrates how phobias can be learned through association.

Additional info: Some explanations and definitions have been expanded for clarity and completeness.