Author Question: In which of the following, is ex post facto research most appropriate? The investigator a. has ... (Read 362 times)

crazycityslicker · **on:** Jun 20, 2018

In which of the following, is ex post facto research most appropriate? The investigator

a. has direct control of the dependent variables.
b. cannot manipulate the dependent variables.
c. cannot manipulate the independent variables.
d. can cause variations on all variables.

Question 2

Volunteers for a research study could introduce bias because

a. they are less likely to show change than subjects who are required to participate.
b. they may be different from nonvolunteers on important variables.
c. they are more subject to the Hawthorne effect than nonvolunteers.
d. Al of these are true.