This topic will provide an overview of the history, scope, and key concepts of psychology as a scientific discipline, including the various approaches and perspectives used in the field.
Introduction to Psychology – Study Notes
1. What Is Psychology?
- Definition: The scientific study of behavior and mental processes.
- Key Focuses:
- How we think, feel, and act.
- Biological, social, and environmental influences on behavior.
- Goal: Explain, predict, and sometimes change behavior and mental processes.
2. Historical Foundations
| Era / Figure |
Main Contribution |
Core Idea |
| Wilhelm Wundt (1879) |
Established the first psychology lab in Leipzig |
Psychology as an experimental science; introspection. |
| William James (1890) |
The Principles of Psychology |
Functionalism – mental processes serve adaptive purposes. |
| Sigmund Freud |
Psychoanalytic theory |
Unconscious mind, psychosexual stages, defense mechanisms. |
| John B. Watson (1913) |
Behaviorism |
Observable behavior is the proper subject of psychology. |
| B.F. Skinner |
Operant conditioning |
Behavior shaped by reinforcement & punishment. |
| Jean Piaget |
Cognitive development |
Stages of mental development in children. |
| Carl Rogers |
Humanistic psychology |
Person‑centered therapy, self‑actualization. |
| Albert Bandura |
Social‑cognitive theory |
Learning through observation; self‑efficacy. |
| Cognitive Revolution (1950s‑60s) |
Shift back to mental processes |
Information‑processing models, memory, perception. |
3. Major Sub‑Fields
| Sub‑field |
What It Studies |
Typical Methods |
| Biological / Neuropsychology |
Brain structures, neurotransmitters, genetics |
fMRI, EEG, lesion studies |
| Cognitive Psychology |
Perception, memory, language, problem solving |
Experiments, reaction‑time tasks |
| Developmental Psychology |
Changes across the lifespan |
Longitudinal & cross‑sectional studies |
| Social Psychology |
Attitudes, group dynamics, prejudice |
Surveys, lab simulations, field experiments |
| Clinical / Counseling Psychology |
Assessment & treatment of mental illness |
Psychotherapy, diagnostic interviews |
| Industrial‑Organizational (I‑O) Psychology |
Workplace behavior, personnel selection |
Job analyses, psychometrics |
| Health Psychology |
Interaction of behavior & health |
Epidemiological surveys, interventions |
| Educational Psychology |
Learning processes, instructional design |
Classroom observations, assessments |
4. Research Methods
| Method |
Description |
Strengths |
Limitations |
| Experimental |
Manipulate independent variable, control extraneous variables |
Causal inference, high internal validity |
May lack ecological realism |
| Correlational |
Measure relationship between two variables |
Useful for naturalistic data |
No causation, possible third‑variable problem |
| Observational |
Systematic watching of behavior (naturalistic or lab) |
Real‑world relevance |
Observer bias, limited control |
| Survey / Questionnaire |
Self‑report of attitudes, experiences |
Large samples, cost‑effective |
Social desirability, recall bias |
| Case Study |
In‑depth analysis of a single individual or group |
Rich detail, hypothesis generation |
Poor generalizability |
| Neuroimaging |
Brain activity measurement (fMRI, PET, EEG) |
Direct link to neural processes |
Expensive, complex interpretation |
5. Core Concepts & Terminology
- Behavior: Any observable action or response.
- Mental Processes: Thoughts, emotions, motivations, perceptions (internal, not directly observable).
- **Nature