Vocabs

2. A research technique for acquiring data about the attitudes or behaviors of a group of people, usually by asking questions of a representative, random sample.
3. study An in-depth study of a single person or group to reveal some universal principle.
4. The relationship between variables.
5. group In an experiment, the group that does not receive the treatment.
6. group In a study, the participants who receive the treatment.
7. method A type of research in which the same people are studied over a long time period.
8. observation The study of behavior in naturally occurring situations without manipulation or control on the part of the observer.
11. bias The concept that people who volunteer to participate in research studies often differ from those who do volunteer.
12. sample A survey population, selected by chance, which fairly represents the general population.
14. correlation An unpleasant stimulus between two variables in which one variable increases as the other variable decreases.
15. variable In an experiment, the factor that is being measured and that may change in response to manipulations of the independent variable.
17. Predisposition to a certain point of view.

1. A controlled scientific procedure to determine whether certain variables manipulated by the researcher have an effect on other variables.
2. sample A sample drawn in such a way that known subgroups within a population are represented in proportion to their numbers in the general population.
3. method 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.
9. variable Factor that researchers manipulate so that they can determine its effect.
10. population The total group to be studied or described and from whom samples may be drawn.
11. Factors that are measured or controlled in a scientific study.
13. A representative segment of a target population.
16. An inert substance used in controlled experiments to test the effectiveness of another substance.