Psychological Methods

5. Factors that are measured or controlled in a scientific study.
6. An experiment that uses both a control group and an experimental group to determine whether the independent variable influences on behavior and, if so, how it does so.
8. The factor that is manipulated by the researcher to determine its effect on another variable.
11. A type of research in which the same people are studied over a long time period.
12. correlation An unpleasant stimulus between two variables in which one variable increases as the other variable decreases.
13. An experiment in which neither the participant nor the researcher knows whether the participant has received the treatment or the placebo.
14. The relationship between variables.
16. The study of behavior in naturally occurring situations without manipulation or control on the part of the observer.
19. A measure of the distance of every score to the mean.
20. An agreement by an individual to participate in research after receiving information about the purpose of the study and the nature of the treatment.
21. In a study, the participants who received the treatment.
22. In an experiment, the group that does not receive the treatment.
23. The concept that people who volunteer to participate in research studies often differ from those who do not volunteer.

1. A controlled scientific procedure to determine whether certain variables manipulated by the researcher have an effect on other variables.
2. A study in which the participants are unaware of whether they are in the control group or the experimental group.
3. An inert substance used in controlled experiments to test the effectiveness of another substance.
4. In an experiment, the factor that is being measured and that may change in response to manipulations of the independent variable.
7. The study of behavior in a controlled situation.
9. A prediction or assumption about behavior that is tested through scientific research.
10. An in-depth study of a single person or group to reveal some universal principle.
14. A method of research that looks at different age groups at the same time in order to understand changes that occur during the life span.
15. A relationship between variables in which one variable increases as the other variable also increases.
17. The total group to be studied or described and from whom samples may be drawn.
18. Rules and standards for proper and responsible behavior.