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Existing Measure
When operationally defining a construct, researchers frequently utilize an existing measure that has been successfully implemented in prior research. Relying on established tools—such as published questionnaires or standardized scales—saves the time and effort required to develop a new instrument. Additionally, existing measures often come with pre-established evidence of reliability and validity, and their use allows researchers to more easily compare and integrate their findings with the broader scientific literature.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of Operationalizing a Variable: Learning
Example of an Experimental Procedure: Testing a Teaching Method
A researcher hypothesizes that students who get more sleep will have better memory. To test this, the researcher asks one group of students to sleep for 8 hours the night before an exam and a second group to sleep for 6 hours. The next day, the researcher measures 'memory' by counting the number of correct answers on a 20-question multiple-choice test. Which part of this study description represents the operational definition of 'memory'?
A researcher plans to study the impact of listening to music on a person's mood. Which of the following is the best operational definition for the 'mood' variable in this study?
Operational Definition of Depression
Existing Measure
Creating a New Measure
Perceived Stress Scale
Purpose of Operational Definitions
Converging Operations
Self-Report Measure
Behavioral Measure
Physiological Measure
Which of the following best describes an operational definition in psychological research?
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Ten-Item Personality Inventory (TIPI)
Proprietary Measure
Directory of Unpublished Experimental Measures
PsycTESTS
Selecting an Existing Measure
Locating Existing Measures
Locating Existing Measures
What is a primary advantage for researchers when they choose to use an existing measure, such as a published questionnaire, rather than developing a new instrument?