Ch. 2 Vocabulary Crossword

3. A type of research in which the same people are studied over a long time period.
7. In an experiment, the factor that is being measured and that may change in response to manipulations of the independent variable.
8. The concept that people who volunteer to participate in research studies often differ from those who do volunteer.
9. A representative segment of a target population.
10. A controlled scientific procedure to determine whether certain variables manipulated by the researcher have an effect on other variables.
12. An in-depth study of a single person or group to reveal some universal principle.
13. Factor that researchers manipulate so that they can determine its effect.
14. The study of behavior in naturally occurring situations without manipulation or control on the part of the observer.
15. A sample drawn in such a way that known subgroups within a population are represented in proportion to their numbers in the general population.
18. In a study, the participants who receive the treatment.
19. An inert substance used in controlled experiments to test the effectiveness of another substance.

1. A survey population, selected by chance, which fairly represents the general population.
2. In an experiment, the group that does not receive the treatment.
4. An unpleasant stimulus between two variables in which one variable increases as the other variable decreases.
5. 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.
6. The total group to be studied or described and from whom samples may be drawn.
8. Factors that are measured or controlled in a scientific study.
11. Predisposition to a certain point of view.
16. 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.
17. The relationship between variables.