Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337613316
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Textbook Question
Chapter 7.2, Problem 4LO
Explain why manipulation of an independent variable is a critical component of an experiment.
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What are the requirements for an experiment to be able to show that changes in one variable cause changes in another?
The value of independent variable is independent of the other variables in the 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 an experiment? Give two examples.arrow_forwardExplain the difference between the one-way fixed effects model and the one-way random effects model.arrow_forwardI don't understand the whole concept of randomized experiments. What does it mean if the cases are not selected randomly but are assigned randomly to groups? How to determine causality? When do we generalize to the whole population?arrow_forward
- Researchers have observed that high school students who watched educational television programs as young children tend to have higher grades than their peers who did not watch educational television. Is this an observational study or a controlled experiment? Explain why.arrow_forwardWhen an interaction term is statistically significant, you must be cautious in interpreting the main effects. True or False?arrow_forwardWhat distinguishes a quasi-experiment from a true experiment? When might a quasi-experiment be more appropriate? What are some examples of quasi-independent variables?arrow_forward
- How could a high degree of experimental mortality seriously affect the validity of an experiment?arrow_forwardIn a one-way ANOVA, there is no interaction term. an interaction term is present. an interaction effect can be tested. the interaction term has (c-1) (n-1) degrees of freedom.arrow_forwardA researcher is testing the effect of one independent variable using three treatment conditions. She compares three group means where there are different people in each group. It is best for her to use which type of statistical analysis?arrow_forward
- A researcher was interested in studying how gender (male vs. female) and age (younger vs. older) affect performance in a simple reaction time task. Which statistical test should be used to assess the effects of gender and age on reaction?arrow_forwardExplain the Potential Outcomes and the Average Causal Effect of using randomized controlled experiments?arrow_forwardExplain the reasons to study randomized controlled experiments?arrow_forward
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what is Research Design, Research Design Types, and Research Design Methods; Author: Educational Hub;https://www.youtube.com/watch?v=LpmGSioXxdo;License: Standard YouTube License, CC-BY