a. random assignment to experimental and control groups
b. allowing subjects to pick which group they want to be in
c. matching subjects in the experimental and comparison groups
d. using waves of cohorts
The main thing to keep track of with respect to focus group dynamics are ____.
a. spontaneity
b. the emergence of themes
c. groupthink and dominant group members
d. group dynamics
Which action would be most likely to result in selection bias?
a. soliciting volunteers from a college class
b. randomly assigning experimental and control groups
c. matching experimental and comparison groups
d. running a double blind experiment