Experimental Design (40 points)

Dr. Cohen is interested in how parents can help their teenagers (under 21) stop drinking. She has 2 different persuasion tactics she will test to see if the tactics work on kids. The tactics are: Direct intervention and indirect intervention. A direct intervention requires parents to talk with their child once a week about not drinking and the perils associated with drinking. The indirect intervention requires parents to NOT talk with the kids but instead to role model a nondrinking, sober lifestyle.

The Task:

Design a pre-test/ post-test control group design and a post-test only control group design to test a hypothesis about the efficacy of these strategies.

Specifically, identify the following:

a. Identify at least 2 hypotheses. (10 points)

b. Identify how you would measure your dependent variable(s). (5 points)

c. Describe your independent variable (e.g., direct or indirect intervention. Think about
how many message interventions you would do (e.g. would the parents talk to
their kids 1 time or once a week for a month, or what?). How many people would you require for each condition? (5 points)

d. Describe your control condition. Will you have a control condition? Why or why not?
If so, what will the parents/kids do in the control condition? (5 points)

e. Describe your manipulation check. How will you know if the parents did only the
direct or only the indirect manipulation? How will you know if kids heard/noticed? (5 points)

f. Describe your sample. Where will you obtain these children? How will you get
permission? How will you ensure parental participation? Make sure this is realistic and doable. (5 points)

g. What issues of external validity might be problematic with the first design and why?
What issues of internal validity might be problematic with both designs and why? (5 points)

* Type your work using complete sentences (no bulleted lists).
There are faxes for this order.