Final answer:
Yes, an operational definition is essential for clear and measurable behavior descriptions. Operational definitions provide a precise description of variables and ensure consistency and validity in a study.
Step-by-step explanation:
Yes, an operational definition is essential for clear and measurable behavior descriptions. Operational definitions provide a precise description of variables and allow researchers to understand how and what is being measured in an experiment. They ensure consistency, replicability, and validity in a study. For example, in a study on how tutoring improves grades, an operational definition might define a 'good' grade as a C or better, or 'tutoring' as one-on-one assistance by an expert in the field hired by an educational institution.