Instructions: For each study below, indicate What type of research design is bei

Question

Instructions: For each study below, indicate What type of research design is being used? What is the independent or quasi-independent variable? (if applicable) )What is the dependent variable? (if applicable) d) What is the scale of measurement for the DV? (if applicable) d) If a correlational design is used, what is a possible alternative explanation (third variable)? Study 1: A team of cognitive psychologists conducted a study on the effects of sleep deprivation on short term memory decay. Forty-eight subjects stayed in a lab for two days. Twenty-four of the subjects are a task that involves reading a list of 20 words, then recalling as many words as possible. Study 2: A researcher examined the effect of different kinds of music on general math ablity. Fortyeight mly assigned to a condition in which they are not permitted to sleep during that twenty-four are allowed to sleep whenever they want. At the end of the two days, the subjects complete Subjects were randomly assigned to do a series of math tasks under one of three conditions: 16 while istening to soft gentle music, 16 while listening to loud intense music, and 16 while in silence. The math quiz contained arithmetic, geometry, and word problems. There were 25 items that were 2 points each. Study 3: each week relates to the number of days being sick per year. Participant the community and provided self-reports through a series of questions on the topics of interest Stu A health psychologist conducted a study on the how the number of hours a person exercised s were randomly selected from dy 4: A study was designed to test the effects of science fiction movies on participants' belief in the upernatural. A scale was designed to measure the degree that a subject believes in the supernatural on a 1-7 LIkert Scale (high scores indicate high levels of belief). Fifty-seven subjects, selected via random digit dialing (RDD) responded to the scale before and after watching Return of the Jedi, a popular science fiction movie Study 5 : A researcher at a drug treatment center wanted to determine the best combination of treatments that would lead to more substance free days. This researcher believed there were two key factors in helping drug addiction: type of treatment and type of counseling. The researcher was interested in either residential or outpatient treatment programs and either cognitive-behavioral, psychodynamic, or client-centered counseling approaches. As new clients enrolled at the center they were randomly assigned to one of six experimental groups. After 3 months of treatment, each client's symptoms were measured. Study 6: An organizational psychologist is hired as a consultant by a person planning to open a coffee house for college students. The coffee house owner wants to know if her customers will drink more coffee depending on the ambience of the coffee house. To test this, the psychologist sets up three similar rooms each with its own theme (Tropical; Old Library, or New York Café ) then arranges to have thirty students spend an afternoon in each room while being allowed to drink all the coffee they like. (The order in which they sit in the rooms is counterbalanced.) The amount each participant drinks is recorded for each of the three themes. Study 2: A director of a small psychotherapy clinic is trying to plan hiring of temporary staff to assist with intake. She is wondering if there was any difference in the use of the clinic during different seasons of the year. Last year, there were a total of 128 new clients. To see if there is a difference by season she looks at how many dients previously entrlled during each eason

Explanation / Answer

study 1- a-Correlational-case control study

c- short term memory loss

d-nominal

e-third variable may be subject's natural memoy capacity or his familiarity with gioven words

Study 2- a- experimental reserahc design

b-Music is independent variable

c-general math ability

d-nominal scale

Study 3- a- Cohort design

b-exercising

c- Being sick or sickness

d-nominal

study-4-a- correlational study

c-belief in supernatural

d- interval scale

e -a third variable could be subjects pre concieved notions about supernatural things

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