Unit 1 Psychology

3. Assigning participants to experimental and control groups by chance
4. A systematic, evidence-based explanation of why and how humans think, feel, and behave.
6. Each member has an equal chance of inclusion.
7. The average of a set of data.
8. Study in which people of different ages are compared with one another at a single point in time.
12. The variable that may change in response to manipulations of the independent variable.
14. The most common in a set of data.
16. The middle of a set of data.
17. A research method in which one manipulates one or more factors to observe the effect on some behavior or mental processes.
18. The difference between the highest and lowest scores in a distribution.

1. Assigns participants to join a study out of a big group by chance.
2. Observing behavior in naturally occurring situations without trying to manipulate and control the situation.
5. Research in which the sample people are restudied and retested or a long period.
9. A measure of the extent to which two factors vary together, and how well either factor predicts the other.
10. The experimental factor that is manipulated.
11. The group that is not exposed to the treatment in an experiment.
13. An ethical principle that ensures individuals have information and understanding before participating in psychological procedures.
15. Bell shaped curve that describes the distribution of many types of data.