Vocabulary

2. the group exposed to the treatment
4. total group to be studied or described and from whom samples may be drawn
7. a substance or treatment that has no effect apart from a person’s belief in its effect
8. both the participants and researchers are unaware of who is receiving the treatment
10. an educated guess
12. standards for proper and responsible behavior
15. type of sample where each member of the population has an equal chance of selection
16. the outcome factor
18. a type of question that prompts or encourages the desired answer
20. collecting data through human or animal participants

1. type of sample where subgroups are represented proportionally
3. portion of the target population that is similar to the target population
5. an investigator manipulates one or more variables to observe the effect
6. a predisposition to a certain point of view despite what the facts suggest
9. any factor other than the I.V.
11. collecting data by asking questions of people in a particular group
13. participants do not know whether they are in the experimental group or the control group
14. the experimental factor (treatment) that is manipulated
17. might produce an effect in an experiment
19. the group not exposed to the treatment