Across
- 2. -who receive the treatment
- 3. -measure of the distance of every score to the mean
- 5. -relationship between variables
- 7. -fairly represents the general populations
- 9. -representative segment of a target population
- 11. -type or research in which the same people are studied
- 14. -substance used in controlled experiments
- 15. -the total group to be studies
- 16. -group to reveal some universal principles
- 17. -a research technique for acquiring data about the attitudes
- 19. -another factor that psychologists must take into account
- 20. -to confirm the results of the original study
Down
- 1. -unplesant stimulus between two variables
- 4. -differ from those who do not volunteer
- 6. -controlled scientific procedure to determine whether certain variable
- 8. -assumption about behavior that is tested through scientific research
- 10. -group that does not receive the treatment
- 12. -response to manipulations of the independent variable
- 13. -cannot be seen or measured directly
- 18. -controlled in a scientific study