Question

Question Help A doctor who belleves strongly that antidepressants work better than "talk therapy" tests depressed patients by treating half of them with antidepressants and the other half with talk therapy. After six months the patients are evaluated on a scale of 1 to 5, with 5 indicating the greatest improvement Answer parts (a) through (d) below a. The doctor is concemed that if his most severely depressed patients do not receive the antidepressants, they will get much worse. He therefore decides that the most severe patients will be assigned to receive the antidepressants. Explain why this will affect his ability to determine which approach works best OA The doctor is letting his empathy get in the way of treating the patients objectively. This may cause personal issues for either the doctor or the patients over the course of the treatment OB. The doctor is creating a second treatment group that is dependent on the severity of the patients depression. This will further confound the results OC. the doctor decides on the treatment, this could introduce bias O D. The doctor is assigning all antidepressants to only the most severely depressed pecple b. What advice would you give the doctor to improve his study? OA The doctor must give an equal number of antidepressants to the least depressed patients and the most depressed patients in order to make the treatment suficiently random OB. The doctor should divide the patients into groups based on how depressed they are, and give out a certain percentage of andidepressants to the least depressed group, a higher percentage to the more depressed group, and so on O c. The doctor should remain as objective as possible in order to increase the chances of successfully treating the patients OD. The doctor should randomly assign the patients to the different treatments OE The doctor should remove the least depressed people from the study e. The doctor asks you whether it is acceptable for him to know which treatment each patent receives and to evaluale them himself at the end of the study to rate their improve his ability to determine which approach works best ent. Explain why this practice will affect OA If the doctor is aware of the treatment each patient receives, it may negatively affect the relationship between the doctor and patient during therapy sessions OB. 1 the doctor is aware of the treatment each patient receives that might infuence his ooinion about the effectiveness of the treatment Click to select your answer data-6.25 201 xisx Show Al c. The doctor asks you whether it is acceptable for him to know which treatment each patient receives and to evaluate them himself at the end of the study to rate their improvement. Explain why this practice will affect his ability to determine which approach works best. OA If the doctor is aware of the treatment each patient receives, it may negatively affect the relationship between the doctor and patient during therapy sessions O B. If the doctor is aware of the treatment each patient receives, that might influence his opinion about the effectiveness of the treatment O C. If the doctor is aware of the treatment each patient receives, he may bribe the patients to skew the results in his favor O D. If the doctor is aware of the treament each patient receives, he may become too invested in the well-being of the patients d. What improvements to the plan in part (c) would you recommend? OA To prevent bias, the doctor should use an evaluation procedure that is resistant to bias O B. To prevent bias, the evaluation should be completed by another doctor in order to make the study as objective as possible. O C. To prevent bias, the sample size should be increased to reduce the effect of his bias on the study O D. To prevent bias, the experiment should be double-blind. Noither the patients nor the doctor evaluating the patients should know whether each patient received medication Click to select your answer Show Al data-6 25 201...xisx

Answer 1

A) option "D" is correct

By deciding to give his most severe patients The anti depressant the doctor is introducing bias to his experiement which can taint the results.

B) option "D " is correct

In this study Be improved the doctor should not decide who receives antidepressant.the doctor should randomly assign the patientS to the different treatment.

C) option "B" is correct

If the doctor knows which of the patients have which treatment this can introduce more bias into the experiment.by knowing the treatment Each patient receives,this can influence his opinion about the effectiveness of the treatment.

D). Option "D" is correct.

In order to prevent bias, which is clearly a minor issue in the experiment(see part a and part c ) the experiment should be double- blind .neither the patient or doctor evaluting the patients should know whether each patient received medication. Option D is correct .