Confound selection 3: A drug company developed a new medication to control the m

Question

Confound selection 3: A drug company developed a new medication to control the manic phase of bipolar manic-depression. The firm hired a hospital psychiatrist to test the effectiveness of the drug. He identified a group of manic-depressive patients and randomly assigned them to a drug or placebo group. Nurse Ratched was told to administer the drug and Nurse Johnson was told to administer the placebo. Each nurse made daily observations of her patients during treatment. A month later the observations were compared. In general, patients in the drug group had behaved more "normally" than patients in the placebo group. The drug company publicized its product's effectiveness. Confound selection 4: Dr. Goodrich wanted to demonstrate that his tires were better than those of his competitor, Dr. Goodyear. From car registration and leasing records, he found 40 salespeople who drove the same model of automobile approximately the same number of miles per week. Anonymously, Dr. Goodrich hired an independent research assistant, who was unaware of the purpose of the study, to randomly assign to 20 of the salespeople a new set of unmarked Goodrich tires, and to the other 20 a new set of unmarked Goodyear tires of the same price and quality. After six months and an average of 15,000 miles traveled by both groups, the assistant aranged for the salespeople to exchange tires. After another six months, and similar mileage, the assistant measured the amount of tread wear and reported that the Goodrich tires had actually worn more than the Goodyear tires. Confound selection 5: An investigator was interested in studying the effect of taking a course in child development upon attitudes toward childrearing. At the end of the semester, the researcher distributed a questionnaire to students who had taken the child development course. Questionnaires were also given to an equal number of students who had not taken the course. The students who had taken the child development course had different attitudes from the students who had not taken the course (cg., they had more positive e families).

Explanation / Answer

IV - It thing that we can control in the experiment,change or manipulation may have effect on DV. DV is the thing that we are measuring. Confounding effect - It is the outside influence that changes the effect of depedent and indepedent variable.Confounding can make the product useless

Confound 3 - DV is the behaviour of patients, IV is the medicine that they are taking confound can be observation errors such as missing out important detail can be compound varaible.The fact that patients are being observed can lead a patient to feel more postive. It can be unconfounded with the help of doctor's assistance, or also by using CCTV camera instead of observational recordings.

Confound 4 - DV can be better performance of the car whereas IV can be use of goodrich and goodyear tyres. Confound variable can be terrain of road, driving of the person. It could have been unconfounded by telling that it is an experiment, and same model should have been driven on the road terrain by similar group of people. Purpose or nature of experiment should have been revealed.

Confound 5 - IV - It can be child development course, DV - can effect of course on the child development attitudes.Confound varaibles can be - current mood of the student, length of the questionnaire, extraneous variables such weather etc. It could have been uncofounded by giving open end questions or by discussing in detail, face to face interview method to be more objective.

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