All of the following are questions used to determine whether the ...

[khang]

All of the following are questions used to determine whether the experimental procedures treat a research participant unethically EXCEPT _____.
 a. Is the research subject subjected to substantial or psychological trauma?
  b. Can the research subject be easily returned to his or her initial state?
  c. Has the research subject provided consent to participate in an experiment?
  d. Is the research participant informed of the purpose of the experiment prior to participating?

Question 2

All of the following are methods for controlling the effects of extraneous variables in experiments except
 a. if practical, hold such extraneous variables constant
  b. assign treatments to test units randomly
  c. use experimental designs that control for the effects of extraneous variables
  d. eliminate the effect of extraneous variables on test units

[jointhecircus]

Answer to Question 1

D

Answer to Question 2

D
The effect of the variables on test units remains; potential extraneous variables must be controlled for in one of the other three ways listed.

[khang]

Excellent

[alexanderhamilton]

Thanks for the timely response, appreciate it