Vocabulary

3. a substance or treatment that has no effect apart from a person’s belief in its effect
7. the group exposed to the treatment
10. a predisposition to a certain point of view despite what the facts suggest
12. the experimental factor (treatment) that is manipulated
14. collecting data through human or animal participants
16. an educated guess
17. might produce an effect in an experiment
19. a type of question that prompts or encourages the desired answer
20. both the participants and researchers are unaware of who is receiving the treatment

1. the outcome factor
2. portion of the target population that is similar to the target population
4. any factor other than the I.V.
5. type of sample where subgroups are represented proportionally
6. total group to be studied or described and from whom samples may be drawn
8. collecting data by asking questions of people in a particular group
9. the group not exposed to the treatment
11. an investigator manipulates one or more variables to observe the effect
13. standards for proper and responsible behavior
15. participants do not know whether they are in the experimental group or the control group
18. type of sample where each member of the population has an equal chance of selection