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Explain how this study meets the definition of experimental research. Specifically, identify how the variables are handled (manipulated and measured), how participants are distributed, and what kind of conclusion the psychologist is equipped to draw based on this design.
Case context: A psychologist wants to study whether listening to classical music while studying improves exam performance. She plans to conduct a study where she controls the study environment, randomly assigns student participants to either a room with classical music playing or a silent room, and measures their scores on a test taken immediately after the study session.
Question: Explain how this study meets the definition of experimental research. Specifically, identify how the variables are handled (manipulated and measured), how participants are distributed, and what kind of conclusion the psychologist is equipped to draw based on this design.
Sample answer: This study meets the definition of experimental research because the researcher exercises control over the study environment and systematically manipulates the independent variable (presence or absence of classical music). Participants are distributed using randomized assignment to either the music or silent conditions. The researcher then measures the dependent variable (test scores). Because this is an experiment, if a significant difference in test scores is found between conditions, the psychologist can draw a causal inference that classical music caused the change in exam performance.
Key points:
- The independent variable (classical music) is systematically manipulated by the researcher.
- The dependent variable (exam performance) is measured to observe the effects.
- Randomized assignment is used to place participants into the music or silent conditions.
- The research design allows the psychologist to draw a causal inference if differences are found.
Rubric: The response must identify the independent variable (classical music) as being systematically manipulated, the dependent variable (exam performance) as being measured, the use of randomized assignment, and explain that the researcher can draw a causal inference due to these experimental controls.
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Research Methods in Psychology - 4th American Edition @ KPU
Related
Types of Experimental Research
Basic Experimental Design Components
Interpreting Experimental Findings in Psychology
Reporting Research in Psychology
Weakness of Experimental Research: Artificial Settings
Ethical Constraints in Experimental Research
The Core Aim of Experimental Research
Primary Strength of Experimental Research: Establishing Causality
A researcher wants to test if a new note-taking strategy improves exam performance. They teach the new strategy to their morning class and the traditional strategy to their afternoon class. At the end of the unit, the morning class scores significantly higher on the exam. The researcher concludes that the new strategy causes better exam performance. Which of the following statements best analyzes the validity of this conclusion?
Falsifiability
Example of an Experiment: Lighting and Worker Productivity
Field Experiment
Experiment
Inability to Manipulate Variables
Experimental Record Keeping
Non-Experimental Research
Quasi-Experimental Research
Comparison of Internal Validity Across Research Designs
Applications of Surveys
Laboratory Experiment
Single-Subject Research
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