Which one of the following types of variables is most difficult to evaluate objectively in a true experiment? Explain why you think that (See instructions below).

a)      Dependent variable

b)     Independent variable

c)      Confounding variable

d)     Extraneous variable

e)      None of the above

Instructions: Make selection, provide a concept definition (text), and support your opinion on the selection with an example from research that illustrates the concept. Do so in a maximum of 250 words. Make use of the participation rubric, found in the Instructor Policy document, as a personal checklist. By answering this question and wrestling with answers given from peers, we ought to achieve a level of UOPX Learning Objectives/competencies 4.1 and 4.2