Systems theory is concerned with all of the following EXCEPT ______.

Why is there less concern about the nature of the manipulation in low-constraint research than there would be in experimental research?

A) Because the informal low-constraint research does not require approval from the IRB. B) Because the participants in low-constraint research have the right to withdraw. C) Because the researcher controls the environment in low-constraint research. D) Because there is no manipulation in low-constraint research.

Which Constitutional Amendment allowed a federal income tax?

a. Tenth b. Twelfth c. Fourteenth d. Sixteenth e. Eighteenth