Final answer:
An operational definition specifies how a variable will be measured in an experiment, ensuring consistency and replicability in research.
Step-by-step explanation:
An operational definition is a detailed specification of how one will measure the properties or attributes of a variable within an experiment. It ensures that variables are quantifiable and that the study's methodology is transparent, allowing for replication.
For example, proclaiming a certain score range as indicative of "good" grades casts a clear-cut expectation for what constitutes successful academic performance in the context of a study on the effects of tutoring on grade improvement.
Employing operational definitions consistently is key to the reliability and validity of experimental data. They enable different researchers to systematically collect data in the same manner, which is crucial for analyzing variables like "use of technology" or "learning" in educational research.
Ultimately, operationalizing variables is at the essence of conducting replicable and meaningful research. Without precise operational definitions, comparing studies or fostering scientific dialogue would be significantly hindered.