While trying to discover the nature of the relationship between stress and blood pressure, a researcher asks participants to complete a difficult task. The researcher monitors the participants' blood pressure while some are exposed to noisy distractions and others stay in a quiet environment. This type of research is a(n)
a. correlational study.
b. experiment.
c. case study.
d. placebo control study.
Question 2
The basis of an experiment is
a. manipulation of a dependent variable.
b. manipulation of an independent variable.
c. Manipulation of a confounding variable.
d. in-depth fact gathering of many variables.