What is a true experiment, and how does it differ from other types of research methods?
A true experiment manipulates an independent variable (IV) and measures its effect on a dependent variable (DV) in a controlled environment to establish cause-and-effect relationships.
What is the key difference between a field experiment and a natural experiment in psychological research?
A field experiment manipulates the IV in a real-world setting while maintaining some control over extraneous variables. In contrast, a natural experiment studies naturally occurring variables without direct manipulation by the researcher.
Why can correlational studies establish relationships between variables but not causation?
Correlational studies measure the strength and direction of a relationship between two variables but do not manipulate an IV. This means that confounding variables could influence the results, preventing causal conclusions.
What is the difference between internal and external validity in quantitative research, and why are they important?
Internal validity refers to how well an experiment controls for confounding variables, ensuring that changes in the DV are due to the IV. External validity relates to how well the findings generalize to real-world settings. Both are crucial for the reliability and applicability of research.
A study finds a strong positive correlation between time spent on social media and levels of anxiety. What are two possible alternative explanations for this finding?
Reverse causation – Higher anxiety levels may lead individuals to spend more time on social media as a coping mechanism rather than social media causing anxiety.
Extraneous variables – A separate factor, such as loneliness or poor sleep habits, could be influencing both social media use and anxiety, creating the observed correlation.