Basic Concepts
In a nutshell: Psychologists use scientific methods to investigate questions about behavior and mental processes.
## How Do Psychologists Study the Mind?
To find out what makes us tick, psychologists use different research methods. These help ensure their findings are reliable and valid.
### Types of Research
- **Experiments:** Researchers manipulate one variable to see its effect on another.
- **Correlational Studies:** Look for relationships between variables without changing them.
- **Surveys and Questionnaires:** Collect large amounts of data from many people.
- **Case Studies:** In-depth studies of a single person or group.
- **Naturalistic Observation:** Watch people in their natural environments.
### Key Terms
- **Independent Variable:** The thing that's changed in an experiment.
- **Dependent Variable:** What’s measured to see if it was affected.
- **Control Group:** The group that doesn’t receive the treatment.
- **Random Assignment:** Ensures every participant has an equal chance of being in any group.
## Why It Matters
Understanding research methods helps us tell good science from myths, like separating real memory boosters from placebos.
Examples
- A researcher tests whether sleep improves test scores by giving one group extra rest.
- A survey is used to find out how many teens experience stress during exam season.