Placebos are used in experiments to a. control for the ...

[segrsyd]

Placebos are used in experiments to
 
  a. control for the variability of individuals who tend to volunteer for research studies.
 b. control for the expectations of some research participants that they will improve just because they are in a research study.
  c. help determine whether an independent variable actually causes a statistically significant change in a dependent variable.
  d. make certain that the treatment and control group are randomly selected.

Question 2

The purpose of a control group in experimental research is to
 
  a. control for the subjects' desire to act according to the experimenter's expectations.
 b. determine whether a treatment or independent variable actually influenced change in the dependent variable.
  c. determine statistical significance.
 d. control the dependent variable.

[choc0chan]

Answer to Question 1

b

Answer to Question 2

b

[segrsyd]

TYSM

[anyusername12131]

Thanks for the timely response, appreciate it