Chapter 1: The Science of Psychology – Foundations, Methods, and Perspectives

The Science of Psychology

What is Psychology?

Psychology is the scientific study of behavior and mental processes. It seeks to understand how individuals think, feel, and act both outwardly and inwardly.

• Behavior: Outward or overt actions and reactions that can be observed directly.

• Mental Processes: Internal, covert activity of our minds, such as thinking, feeling, and remembering.

Historical Foundations of Psychology

Wilhelm Wundt and Structuralism

• Wilhelm Wundt established the first formal psychology laboratory in Germany in 1879.

• Known for objective introspection: examining and measuring one's own thoughts and mental activities.

• Edward Titchener, Wundt's student, brought Structuralism to America, focusing on breaking down conscious experience into basic elements (thoughts, feelings, sensations).

• Structuralism lost relevance quickly as psychology evolved.

William James and Functionalism

• Considered the "father of American Psychology."

• Proposed Functionalism: focused on the purpose of the mind—how it helps people adapt to the world.

• Major work: The Principles of Psychology.

• Influenced educational psychology and industrial-organizational psychology.

Major Early Approaches

Gestalt Psychology

• Founded by Max Wertheimer.

• Emphasized that "the whole is greater than the sum of its parts."

• Studied sensation and perception; now part of cognitive psychology.

• Example: The mind perceives a complete circle even when parts are missing.

Psychoanalysis

• Developed by Sigmund Freud.

• Theory and therapy based on the existence of an unconscious mind where threatening urges and desires are repressed.

• Believed repressed urges could cause nervous disorders.

• Stressed the importance of early childhood experiences.

Behaviorism

• Founded by John B. Watson, inspired by Ivan Pavlov's work on conditioning.

• Focuses on observable behavior that can be directly seen and measured.

• Demonstrated that phobias can be learned (e.g., the "Little Albert" experiment).

Modern Perspectives in Psychology

Psychodynamic Perspective

• Modern version of psychoanalysis.

• Focuses on development of self and motivations behind behavior, not just sexual motivations.

Behavioral Perspective

• B.F. Skinner studied operant conditioning of voluntary behavior.

• Introduced the concept of reinforcement.

Humanistic Perspective

• Reaction to psychoanalysis and behaviorism.

• Emphasizes free will and self-actualization.

• Key figures: Abraham Maslow, Carl Rogers.

Cognitive Perspective

• Focuses on memory, intelligence, perception, problem-solving, and learning.

Sociocultural Perspective

• Examines how social and cultural environments influence behavior and thinking.

Biopsychological Perspective

• Studies biological bases of behavior and mental processes, including genetics, hormones, and the nervous system.

Evolutionary Perspective

• Explains behavior through the lens of adaptation, survival, and natural selection.

Application: Case Study Example

Case: Andrea, a 19-year-old college student

• Andrea exhibits symptoms of both anorexia and bulimia.

• Her eating disorder began during a stressful period in high school.

• She maintains low weight through food restriction and excessive water intake, occasionally bingeing and purging.

• Her self-image and need for control are central to her disorder.

• This case illustrates the importance of psychological assessment and the influence of personal history and environment.

Psychological Professionals and Specializations

Professional	Description
Psychologist	Holds a doctoral degree in psychology; may specialize in research, teaching, or clinical practice.
Psychiatrist	Medical doctor specializing in diagnosis and treatment of mental disorders; can prescribe medication.
Psychiatric Social Worker	Focuses on social and environmental factors influencing mental health; often works in clinical or community settings.

Work Settings of Psychologists

Where Psychologists Work	Percentage of Total
University and four-year colleges	35%
Self-employed	21%
Private for profit	18%
Private not for profit	9%
Schools/other educational settings	7%
State and local government	6%
Federal government	4%

Subfields of Psychology

Subfield	Percentage of Total
Clinical	34%
Counseling	13%
Developmental	12%
Experimental and other research areas	8%
Cognitive	6%
General	6%
Social and personality	6%
Industrial/organizational	5%
School	4%
Other	4%
Educational	2%

The Scientific Approach in Psychology

Steps in the Scientific Approach

1. Perceive the question

2. Form a hypothesis

3. Test the hypothesis

4. Draw conclusions

5. Report your results (replication is important for reliability)

Goals of Psychology

• Description: What is happening?

• Explanation: Why is it happening?

• Prediction: When will it happen again?

• Control: How can it be changed?

Descriptive Methods

Naturalistic Observation

• Observing subjects in their natural environment.

• Advantage: Realistic picture of behavior.

• Disadvantage: Observer effect and observer bias.

Laboratory Observation

• Observing subjects in a controlled environment.

• Advantage: Control over environment and use of specialized equipment.

• Disadvantage: Artificial setting may produce unnatural behavior.

Case Studies

• In-depth study of one individual.

• Advantage: Tremendous detail.

• Disadvantage: Cannot generalize to others.

• Example: Phineas Gage, who survived a severe brain injury.

Surveys

• Researchers ask questions to a representative sample of the population.

• Advantage: Data from large numbers of people; can study covert behaviors.

• Disadvantage: Must ensure sample is representative; subject to courtesy bias.

Correlations: Finding Relationships

Correlation

• Measures the relationship between two variables.

• Correlation coefficient (r): Ranges from -1.00 to +1.00.

• The closer to +1.00 or -1.00, the stronger the relationship.

• No correlation = 0.0; perfect correlation = -1.00 or +1.00.

• Positive correlation: Variables increase or decrease together.

• Negative correlation: Variables move in opposite directions.

Important: Correlation does not prove causation!

The Experiment: Determining Cause and Effect

Key Concepts

• Experiment: Deliberate manipulation of a variable to observe effects on behavior.

• Operationalization: Defining variables in measurable terms.

• Independent Variable (IV): Manipulated by the experimenter (e.g., violent TV).

• Dependent Variable (DV): Measured response or behavior (e.g., aggressive play).

• Experimental Group: Receives the IV.

• Control Group: Does not receive the IV; may receive placebo.

• Random Assignment: Randomly assigning subjects to groups to control for confounding variables.

Experimental Hazards and Controls

• Placebo Effect: Participants' expectations influence their behavior.

• Experimenter Effect: Experimenter's expectations unintentionally influence results.

• Single-blind Study: Subjects do not know their group assignment.

• Double-blind Study: Neither experimenter nor subjects know group assignments.

Ethics in Psychological Research

Guidelines for Research with People

• Institutional Review Boards (IRBs) review studies for safety and ethics.

• Common ethical guidelines include:

  • Weighing rights and well-being of participants against scientific value.

  • Informed consent and right to withdraw.

  • Justification of deception.

  • Protection from risks and full debriefing.

  • Confidentiality of data.

  • Responsibility for correcting undesirable consequences.

Animal Research

• Used to answer questions not possible with human subjects.

• Focus on minimizing pain and suffering.

• Animals are used in about 7% of psychological studies.