Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337672023
Author: GRAVETTER
Publisher: Cengage
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Textbook Question
Chapter 7, Problem 7E
Identify the two characteristics needed for a research study to qualify as an experiment.
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Chapter 7 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
Ch. 7.1 - Describe the general purpose of an experimental...Ch. 7.1 - Define independent, dependent, and extraneous...Ch. 7.1 - Describe the third-variable problem and the...Ch. 7.2 - Explain why manipulation of an independent...Ch. 7.2 - Explain why control of extraneous variables is a...Ch. 7.2 - Explain how an extraneous variable can become a...Ch. 7.3 - Describe the three primary techniques for...Ch. 7.4 - Describe the purpose for control conditions in...Ch. 7.4 - Explain when a manipulation check is needed,...Ch. 7.4 - Define field studies and simulation, explain why...
Ch. 7 - In addition to the key words, you should also be...Ch. 7 - Dr. Jones conducted a study examining the...Ch. 7 - In an experiment examining human memory, two...Ch. 7 - It has been demonstrated that students with high...Ch. 7 - A researcher would like to compare two methods for...Ch. 7 - Define extraneous variable and explain how...Ch. 7 - Identify the two characteristics needed for a...Ch. 7 - Identify the two active methods of preventing...Ch. 7 - Explain how the process of randomly assigning...Ch. 7 - Can a research study be an experiment without a...Ch. 7 - What is the general purpose of a manipulation...Ch. 7 - What is the general purpose for using a simulation...
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- What is meant by the sample space of an experiment?arrow_forwardWhat is an experiment? Give two examples.arrow_forwardDescribe how the goal of an experimental research study is different from the goal for nonexperimental or correlational research. Identify the two elements that are necessary for an experiment to achieve its goal.arrow_forward
- It turns out that the survey study at the U of M sampled students from a single student residence hall. Explain why sampling students from a single residence hall would have an impact on the external validity of the study.arrow_forwardWhich research design studies only people who are initially free of the disease of interest? Explain how this study design is different from the rest of the research designs a. Case control b. Cohort c. Cross sectional d. Experimentalarrow_forwardExplain the difference between an observational study and an experiment. Give the description of a real-word example of each of these types of studies. Explain the purpose of blinding (single or double) in experimental studies using an example.arrow_forward
- 8:55 1 1 Student A imperial.instructure.com Experiment 1: You believe that caffeine can improve the capacity of short-term memory (STM). It is widely known that STM capacity 7 items (m=7)on average with a standard deviation of 2 items (s=2). You randomly sampled n=8 participants and have then drink a large quantity of coffee. Fifteen minutes later you administer a STM test to each participant and measure the number of items remembered. The data are shown below. Use these data to answer the following questions. Excel should be used to obtain the sample mean, standard deviation and standard error. Perform a 2-tailed z-test with a=0.05 to determine if caffeine influences memory. Number Participant of items 1 2 9 3 7 4 6 6 7 7 8 9arrow_forwardShould an observational study or an experiment be performed to answer the research question below? Explain your choice. Do students who miss their classes frequently earn lower grades than those who attend a high percentage of their classes?arrow_forwardA researcher collects data from a sample of children with Crohn's disease and then compares that data to data collected from a sample of children without the disease. What type of study design is the researcher using for this study? Cohort Cross-sectional Quasi-experimental Case-Controlarrow_forward
- If I studied the relationship between class size and student achievement, what kind of research design would I use?arrow_forwardYou wanted to see if there are differences in the sleeping patterns between males and females when they take an over the counter sleeping aid. You did a survey of 300 males and 300 and females after they took the aid. Would this be an experiment or an observational study?Explainarrow_forwardDo sports drinks help prevent cramps in endurance sports? At the end of a marathon, officials will ask runners if they drank water or a sports drink during the race, along with whether or not they suffered any cramps. Is this an observational study or experiment?arrow_forward
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