*4. Refer to Example 2 about Janet’s dissertation research. Explain whether each of the following changes would have been a good idea or a bad idea:

*a. Have someone who is blind to conditions and has not heard the volunteers’

voices before listen to the phone calls to assess whether a firm “no” was given.

b. Have Janet flip a coin each time a volunteer comes to her office to decide if they should go into the role-playing group or the control group.

c. Use a variety of different solicitors rather than Brad alone.