One of the challenges of conducting health research is that it is impossible, and unethical, to manipulate certain variables, such as sexual behaviors or smoking. The research design that examines differences between groups without manipulating these groups is
A) experimental
B) ex post facto
C) random assignment
D) longitudinal
Question 2
Researchers want to examine whether writing about the experience of breast cancer increases feelings of hope and optimism. Breast-cancer patients were randomly assigned to one of two essay conditions: writing about their breast cancer or writing about
A) hope and optimism.
B) breast cancer diagnosis.
C) writing about everyday tasks.
D) the essay conditions.
Health effects of Caffeine
Blocked at every turn by congressional Republicans who hated him, President Obama turned to techniqu
The Increasing Cost of Health Care, 1960–2010
Remaining health-adjusted life expectancy (years) at age 25
Operations Research
Gel electrophoresis, an essential laboratory technique in biological science research