A psychologist would like to evaluate the effect of Cognitive-Behavioral Therapy and antidepressant use on depression....
A psychologist would like to evaluate the effect of Cognitive-Behavioral Therapy and antidepressant use on depression. He obtains 10 clinical participants for a period of 2 months. During the first month, the participants are given no therapy; half the participants are given an anti-depressant and the other half receive a placebo. This is followed by a diagnostic Depression test (0-10). During the second month, those same participants continue treatment, but now all receive CBT. This is then again followed by a diagnostic depression test (0-10). Below is the data. Evaluate the effect of both CBT and antidepressant-use on Depression.
|
Pre-CBT |
Post-CBT |
|
|
Placebo |
8 7 9 8 9 |
7 6 9 3 4 |
|
Anti-depressant |
8 4 8 9 7 |
3 4 2 5 5 |
- (2 pts) What test is appropriate for this analysis?
- (3 pts) State the null hypothesis/es:
- (3 pts) State the alternative hypothesis/es:
- (2 pts) Calculate the obtained statistic:
- (3 pts) Make a decision/s:
What does your decision mean?
Homework Answers
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A psychologist would like to evaluate the effect of
Cognitive-Behavioral Therapy and antidepressant use on depression....
Mary wants to know the impact of medication and therapy on depression rates. She recruits 16...
Mary wants to know the impact of medication and therapy on depression rates. She recruits 16 people who want treatment for depression she randomly assigns them to receive therapy or no therapy and to receive Medication or Placebo. After two months in the study, these are participants’ scores for depression as assessed by the Hamilton Depression inventory. Medication Placebo Therapy 3 5 3 6 5 3 7 3 No Therapy 9 10 9 12 10 7 13 11 What statistical...
A clinical psychologist is interested in whether a new therapy decreases feelings of depression. What type...
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a= .05 A therapist would like to evaluate the effectiveness of a procedure for treating depression....
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Seasonal affective disorder (SAD) is a type of depression during seasons with less daylight (e.g., winter...
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An educational psychologist has developed a mediation technique to reduce anxiety. The psychologist selected a sample...
An educational psychologist has developed a mediation technique to reduce anxiety. The psychologist selected a sample of high anxiety students that are asked to do the mediation at two therapy sessions a week apart. The participants' anxiety is measured the week before the first session and at each subsequent session. Below are the anxiety scores for the participants. What can the psychologist conclude with α= 0.05? before session 1 session 2 9 6 8 5 8 6 9 6 8...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo Group 2 Clozapine 9 4 8 5 4 6 7 5 5 3 7 Mean...
A therapist would like to evaluate the effectiveness of a procedure for treating depression. A sample...
A therapist would like to evaluate the effectiveness of a procedure for treating depression. A sample of n = 9 depressed clients is obtained and each person's level of depression is measured using a standardized questionnaire before they begin the therapy program. Two weeks after therapy, each client's level of depression is measured again. For this sample, the average level of depression dropped by MD = 4.7 points following therapy. The difference scores had a variance of s2 = 36....
QUESTION 2 A psychologist is interested in whether the number of times a day schizophrenics hear...
QUESTION 2 A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo 9 Group 2 Clozapine 4 8 5 4 6 7 5 5 7...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo Group 2 Clozapine 9 4 nducted on a population with ME75 and a sample with...
Suppose that a psychologist is interested in performance on a cognitive task under sleep-deprived and rested...
Suppose that a psychologist is interested in performance on a cognitive task under sleep-deprived and rested conditions among 10 participants. Performance will be measured by the number of errors made by the participants in each condition. The researcher believes that more errors will be made under the sleep-deprived condition. Her observations are reported below. Use the 7 steps of null hypothesis testing to test her hypothesis, set alpha at .01. For this problem, MD = -3.1 and SED = 3.14...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo Group 2 Clozapine 9 4 8 5 4 6 7 5 5 3 7 Mean...
QUESTION 2 A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo 9 Group 2 Clozapine 4 8 5 4 6 7 5 5 7...
A psychologist is interested in whether the number of times a day schizophrenics hear voices is impacted by the drug Clozapine, an antipsychotic. The researcher studies how many voices schizophrenics perceive in a 2 hour period between a group of participants who have taken Clozapine and a group of participants who take a placebo. The numbers are presented in the table below. Group 1 Placebo Group 2 Clozapine 9 4 nducted on a population with ME75 and a sample with...
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