To prepare for this assessment, locate scholarly articles on Milgram’s studies on obedience to authority and Zimbardo’s Stanford Prison experiment on the power of social roles. These two pivotal studies provide the basis for this assessment.

Examine the controversy related to research and ethics in the field of social psychology. Consider the information you located on Milgram’s studies on obedience to authority and Zimbardo’s Stanford Prison experiment on the power of social roles. Include the following in your assessment:

• Describe what these studies revealed about conformity and obedience to authority.
• Explain the benefits from these research studies. What knowledge or insight was gained?
• Describe the impact of the studies in terms of the effects on the human participants.
• Explain how these (and other) controversial research studies have shaped the principles and standards in the current APA Ethical Principles of Psychologists and Code of Ethics.
• Develop evidence-based arguments both for and against these types of controversial research studies.
• Do you think that the information that was obtained was worth the risks to the human subjects? Explain and support your position.

Your submitted assessment should be 5–7 pages in length, excluding title page and reference page, and use references from at least three scholarly resources. Be sure to follow APA guidelines for format and style.

Additional Requirements

• Include a title page and reference page.
• At least three current scholarly or professional resources.
• APA format.
• Times New Roman font, 12 point.
• Double spaced.

ASSIGNMENT 04

PS390 Statistical Reasoning in Psychology

Directions: Be sure to save an electronic copy of your answer before submitting it to Ashworth College for grading. Unless otherwise stated, answer in complete sentences, and be sure to use correct English, spelling, and grammar. Sources must be cited in APA format. Your response should be four (4) double‐spaced pages; refer to the “Format Requirementsʺ page for specific format requirements.

StatCrunch

StatCrunch tutorial videos are available at http://www.youtube.com/view_play_list?p=BE055F65E43B4973.

1. (25 points) A prison psychologist recorded the number of rule infractions for 15 prison inmates over a six-month period to be 5, 4, 2, 4, 3, 5, 2, 0, 4, 4, 5, 5, 3, 4, and 3.

1. Make a frequency table.

1. Make a histogram based on the frequency table.

1. Describe in words the shape of the histogram.

1. (25 points) Identify and solve this problem by hand.

The head of public safety notices that the average driving speed at a particular intersection averages μ = 35 mph with a standard deviation of σ = 7.5 mph. After a school speed limit sign of 20 mph is placed at the intersection, the first 40 cars travel past at an average speed of 32 mph. Using the .01 significance level, was there a significant change in driving speed?

1. Use the five steps of hypothesis testing (report results in APA format).

1. Sketch the distributions involved.

1. Figure the confidence limits for the 99% confidence interval.

1. (25 points) You will have to use a combination of StatCrunch and hand calculations (e.g., effect sizes) to solve the following problems.

A social psychologist gave a questionnaire about concern for farm workers to seven participants before and after they attended a film about union organization of farm workers. The results are shown below with high scores meaning high concern. Using the .05 significance level, do these results support the hypothesis that the film affected concern for the lives of farm workers?

Scores on the Concern Measure

Participant       Before             After

A                     17                    20

B                     7                      4

C                     10                    11

D                     13                    15

E                      8                      5

F                      9                      8

G                     11                    14

1. Use the five steps of hypothesis testing.

1. Figure the effect size and find the approximate power of this study.

1. Report results in APA format.

1. (25 points) You will have to use a combination of StatCrunch and hand calculations (e.g., effect sizes) to solve the following problems.

A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a short-term memory task that yielded the results in the table that follows. Using the .05 significance level, did sleep deprivation reduce short-term memory?

Mean Number of Letters Remembered

Sleep Deprived           Normal Sleep

7                                  9

8                                  8

7                                  11

9                                  7

1. Create the appropriate graph for this problem.

1. Use the five steps of hypothesis testing.

1. Figure the effect size.

1. Report results in APA format