Chronic tension headaches. Doctors identify \"chronic tension-type headaches\" t

Question

Chronic tension headaches. Doctors identify "chronic tension-type headaches" that occur almost daily for at least six months, Can antidepressant medications or stress management training reduce the number and severity of these headaches? Are both together more effective than either alone? Investigators compared four treatments: antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management. Outline the design of the experiment. The headache sufferers named in the table have agreed to participate in the study. Use software or Table B at line 151 to randomly assign the subjects to the treatments. I Anderson 7 Archberger Bezawada Cetin Cheng Chronopoulou Engelbrecht Guha 2 Codrington Dat 3Hua Lipka Kumar Leaf Nolan Shu Tang 35 Martin Mehta Park Saygin Towers Tyner Vassilev Wang Watkins X 2,4 2) outline the design of a completely randomized experiment and use Table B starting on line 151 to assign the subjects that will go into the first treatment group. 3) If we suspect that men and women may react differently to the treatments we would use a design. This would allow for the possibility of coming to separate conclusions for men and women. 4) The purpose of random assignment in an experiment is... 5) "Statistically significant" results mean

Explanation / Answer

Answer:

1. Subjects: 36 volunteers who have headaches that occur daily for at least 6 months.

Factors: medicine (antidepressant alone, placebo alone, antidepressant plus stress management, and placebo plus stress management)

Response variable: change in number and severity of the headaches

2.

We need to outline how we will assign a person to a group once a person is chosen. One method is to do the following:

• Assign the first person to placebo and stress management,

• second to Antidepressant and stress management,

• the third to placebo alone,

• the fourth to antidepressant alone,

• the fifth back to placebo and stress management,

• the sixth to Antidepressant and stress management and continue till everyone is assigned.

3. If we suspect that men and women may react differently to the treatments we would use a crossover design. This would allow for the possibility of coming to separate conclusions for men and women.

4. The purpose of random assignment is to take a sample generally a convenince sample and randomly divide into two or more groups that represent each other.

5. Statistically significant is the chances that a relationship between two or more variables is caused by something other than random chance.

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