This preview shows page 1. Sign up to view the full content.
Unformatted text preview: placebo. This is important because it is common for a subject to psychologically feel better when they think they have been given a treatment, even when they have not. *4.) This allows the researcher to distinguish between the effects of the vaccine on men and women separately. *5.) Observational study 7.) Observational study 9.) Prospective 11.) Cross-Sectional 32.) Confounding could occur in a study on whether or not parents incomes cause higher student grades....
View Full Document
- Fall '08