Introduction
Psychology uses structured methods to understand behavior, thoughts, and feelings. This article summarizes the core research approaches that make psychological findings reliable.
Key Concepts
- Experimental design tests cause and effect using controlled variables.
- Observational research records behavior without interference.
- Surveys and questionnaires collect self-reported attitudes and experiences.
- Correlation identifies relationships but does not prove causation.
- Ethical standards protect participants and ensure results are valid.
Examples / Experiments
- Laboratory experiments isolate variables, such as measuring how sleep affects memory.
- Naturalistic observation studies behavior in real settings, like children at play.
- Longitudinal studies follow the same people over time to track development.
- Case studies examine one individual in depth, often revealing rare conditions.
- Cross-sectional studies compare different groups at a single time point.
Key Takeaways
- Research methods shape what psychologists can learn and how strongly they can conclude.
- Controlled experiments are best for testing cause and effect.
- Observational and survey methods are useful for real-world behavior and attitudes.
- Correlation can point to links, but only experiments support causal claims.
- Ethical research requires consent, privacy, and careful treatment of participants.
Final Note
A strong grasp of research methods helps you evaluate psychological claims and distinguish evidence from opinion. Keep these core ideas in mind when reviewing studies.
Disclaimer
This article series is based on the MIT Introduction to Psychology course lectures. The content written here reflects my personal understanding and interpretation of the topics after going through the lectures.
These articles are created for learning and educational purposes only. I do not claim ownership of the original course material, and all credit for the concepts and teachings belongs to the instructors and MIT OpenCourseWare.
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