Intro to Psychology — Comprehensive Notes
Psychology as a Science and Definition
Psychology is the scientific study of the mind and behavior; the mind is often described as mental processes.
Humanities/arts vs science: psychology is grounded in science and uses the scientific method.
In tests, look for options that include the term scientific and refer to the study of either the mind/mental processes or behavior.
This chapter emphasizes why scientific methods are important for psychology.
Critical Thinking in Psychology
Critical thinking means not accepting arguments or assumptions at face value; you analyze, question, and evaluate.
Steps involved:
Question the resource or claim
Examine assumptions
Appraise resources and identify hidden biases
Evaluate evidence and assess conclusions
Example discussed: a claim about snow in the morning vs how you’d verify it with sources and research before believing or sharing.
The underlying commitment: science is about exploration and understanding without misleading or being misled.
What Psychology Is Not
Psychology is not a collection of ideas or pseudo-psychology; pseudo-psychology includes unscientific methods like physiognomy (reading faces/hands to predict outcomes) or making claims without using scientific methods.
Media portrayals (Hollywood) often misrepresent psychology as a psychic or fortune-telling practice; real psychology relies on the scientific method.
Psychology is not just about therapy; therapy is only one chapter focusing on treating psychological disorders; psychology as a field covers many areas beyond disorders.
Freud is not the founder of psychology; he founded psychoanalytic theory (unconscious mind) and is discussed in the context of his influence, but modern psychology is more diverse than his views.
Freud’s influence remains but is limited: today less than about <10\% of psychologists read Freud's writings; his voice is just one among many.
Psychology vs Psychiatry:
Psychiatrist: medical doctor (MD), can diagnose and prescribe medications for psychological disorders.
Psychologist: studies psychology and typically holds a PhD or PsyD; prescriptive rights are limited and in some states (with extra training/licensing) psychologists can prescribe medications for psychological disorders (not for general medical conditions).
States with prescription privileges for psychologists (with extra training): New Mexico (2002), Louisiana (2004), Illinois (2004); more generally, such practice is limited to medications related to psychological disorders when allowed.
Psychology is grounded in science; science is the cornerstone of psychology and the scientific method transforms ideas from speculation into scholarship.
The channel of media myths vs. scientific practice is highlighted to keep expectations aligned with evidence.
Psychology encompasses many domains beyond disorders, including research on brain, behavior, and mental processes.
Founders, Major Schools, and Fields of Psychology
Wilhelm Wundt (German) founded the first psychology laboratory and is considered the founder of modern psychology; he, with his student (Titchener in some accounts), pursued structuralism.
Structuralism: sought the structure of the mind by breaking experiences into their components; used introspection as a method.
Functionalism (William James): focused on mental processes and how they help an organism adapt to its environment; emphasized the function of mental activities and the operation of the whole mind.
Freud and psychoanalytic theory: emphasized the unconscious mind and early childhood experiences; his influence remains historically significant, though less dominant in contemporary psychology.
Behaviorism: champions like Pavlov, Watson, and Skinner studied observable behavior; sought to measure, predict, and control behavior through empirical methods; largely focused on external behavior and often ignored internal mental states.
Cognitive psychology: emerged in the 1950s–60s, focusing on mental processes such as perception, memory, and reasoning; later linked to brain activity via cognitive neuroscience.
Humanistic psychology: emphasized human potential and growth (Rogers, Maslow); focused on fulfilling needs and achieving self-actualization.
Evolutionary psychology: studies how behavior and mind have evolved through natural selection; emphasizes nature and nurture as interacting forces.
Cognitive neuroscience: bridges cognitive psychology and brain biology, using brain imaging to study how cognitive processes relate to neural activity.
Key fields and subareas (as listed in the lecture):
Personality psychology
Biological (biopsychology) psychology
Family psychology
Evolutionary psychology
Psychology of women
Sports psychology
Health psychology
Social psychology
Industrial/Organizational (IO) psychology
Cognitive psychology
Clinical psychology
Notable historical notes:
Freud is a founder of psychoanalytic theory, not the founder of psychology.
The earlier claim of Freud as founder is corrected; Wilhelm Wundt is the founder of psychology as a science.
Toy Washburn is mentioned as the first female PhD in psychology and author of The Animal Mind (1908). There are notes about female leadership in psychology history (APA presidents, etc.).
The Biopsychosocial Model
Psychology and behavior are products of three interacting influences: biological, psychological, and social.
Biological: genetics, brain structure, nervous system, biochemical processes, etc.
Psychological: learned fears, cognitive processes, perception, emotions, mental states.
Social: cultural norms, family, peers, media, social context, organizational factors.
The biopsychosocial approach is used to understand conditions or disorders by integrating these three levels.
The discussion emphasizes that humans are biopsychosocial systems, with disorders and behaviors resulting from multiple interacting factors.
The Mind-Body-Evolution Narrative (Historical Perspective)
Philosophical roots discussed in the accompanying video segment:
Aristotle vs. Plato: nature of knowledge; Plato (nativism) vs. Aristotle (empiricism).
Descartes: mind-body dualism; proposed that body and mind are different substances.
Hobbes argued for mind as brain activity and challenged dualism.
Phrenology (Franz Josef Gall, as referenced in the slide alongside others) connected skull structure with mental faculties; later debunked as a simplistic map.
Pierre Flourens (as mentioned in transcript as Pierre Florent) and Paul Broca advanced understanding that brain structure underpins mental processes via surgical and postmortem evidence.
Helmholtz and Wundt: foundational figures that contributed to the emergence of experimental psychology and the first psychology department.
William James: functionalism and the Darwinian influence; a shift away from reducing consciousness to its parts.
The rise of cognitive revolution and the integration of brain science with behavior.
The narrative closes with the idea that psychology today spans a broad range of approaches united by science, and continues to connect old questions with new scientific methods.
The Scientific Method in Psychology (Key Concepts and Terms)
Core terms to know:
Theory: an explanation using an integrated set of principles that organizes observations and predicts behaviors and events.
Hypothesis: a testable prediction implied by a theory.
Research study / Experiment: a systematic method to test a hypothesis; includes manipulation, control, and measurement.
Replication: repeating a study with different participants and in different environments to confirm findings.
Meta-analysis: statistical synthesis of results across multiple studies to derive a broader conclusion.
Case study: descriptive technique focusing on one or a few individuals or cases to reveal universal principles.
Naturalistic observation: observing subjects in their natural environment without manipulation.
Survey: collecting data through questionnaires or interviews to gauge opinions, behaviors, or characteristics.
Operational definition: a clear statement of the procedures used to measure a variable.
Correlation: a measure of the extent to which two variables vary together; does not imply causation.
The correlation concept can be summarized as: the relationship between two variables; one can predict the other to some degree.
Types of correlation:
Positive correlation: both variables increase together. r>0
Negative correlation: one increases while the other decreases. r<0
Zero correlation: no relationship.
Causation: demonstrated when an experiment shows that changing the IV causes a change in the DV, ruling out alternative explanations.
Independent variable (IV): the variable that is manipulated to observe its effect.
Dependent variable (DV): the outcome measured in the experiment.
Experimental group vs. control group: groups used to compare the effect of manipulation; random assignment helps ensure equivalence.
Confounding variable: an external factor that could influence the results and threaten internal validity.
Falsifiability: a theory must be testable and capable of being proven false through testing. A theory that cannot be tested is not scientifically useful.
The process from observation to theory to testing:
Observation → Theory → Hypothesis → Research study/Experiment → Replication → Meta-analysis; a theory becomes widely accepted only after multiple tests and potential falsification.
Practical notes:
Descriptive/descriptive techniques (case study, naturalistic observation, survey) can reveal universal principles only to a limited extent due to generalizability concerns.
A correlation informs about a relationship but does not prove causation; experiments are required to establish causality.
Time scale and effort: theories can take years to be tested and refined; a full theory must be falsifiable and supported by converging evidence across multiple studies.
The chapter emphasizes that psychology combines elements of biology and statistics with theory-building to explain behavior and mental processes.
Concrete Examples to Ground Concepts
Sleep and memory (theory and hypothesis):
Observation: sleep affects memory performance.
Hypothesis: If sleep is restricted, memory performance will decline the next day.
Experimental design: manipulate amount of sleep (IV) and measure memory performance (DV).
Replication would test this across different populations and settings; meta-analysis would combine results to determine overall effect.
Breast milk and intelligence (example for IV/DV and group design):
Observation: infants who received breast milk have higher intelligence scores later.
Independent variable: breast milk exposure (breast milk vs no breast milk).
Dependent variable: later intelligence score.
An experiment would randomly assign infants to breast milk exposure or not (where ethical and feasible) to test causality and control for confounds.
Weight and exercise (IV/DV example):
Observation: more exercise is associated with less weight gain.
Independent variable: amount of exercise; Dependent variable: weight gain.
This illustrates IV/DV roles and potential confounds (diet, metabolism).
Quick Recap: Key Takeaways for Exam Readiness
Psychology is a science: it relies on the scientific method to study mind and behavior.
Critical thinking is essential: always verify claims, examine sources, and seek evidence.
Psychology is not pseudo-psyhology or Hollywood fantasy; it is evidence-based.
Freud is not the founder of psychology; Wilhelm Wundt founded psychology as a science; structuralism and functionalism were early schools; behaviorism, humanistic, evolutionary, and cognitive perspectives followed.
The biopsychosocial model explains behavior as an interaction of biology, psychology, and social factors.
The scientific method involves theory, hypothesis, testing (experiments), replication, meta-analysis, case studies, naturalistic observation, and surveys; operational definitions are key for measurement.
Correlation vs causation: correlations show relationships, not causation; experiments establish causation with IV and DV and random assignment, while controlling confounds.
Common terms: independent variable, dependent variable, confounding variable, replication, meta-analysis, falsifiability.
A broad array of subfields exists in psychology (personality, biological, health, social, IO, cognitive, clinical, etc.), reflecting its diverse applications.
Important reminders for the exam:
In multiple-choice questions about psychology, look for the option that uses the term scientific and refers to the study of either mind/mental processes or behavior.
Be ready to identify IVs and DVs in simple examples, and to distinguish correlation from causation.
Remember key historical milestones and figures (Wundt and structuralism; James and functionalism; behaviorists; cognitive revolution; modern cognitive neuroscience).