An operational definition describes a behavior in observable and measurable terms so that different people would record it the same way.
Example
Vague: “Aggression”. Operational: “Hitting another person with an open or closed hand, making contact with any part of their body.”
Key points
- Describe what the behavior looks or sounds like, not feelings or intentions.
- Include clear examples of what counts and what does not.
- Clear definitions make data more consistent across observers.
Exam tip
If a question asks which description is best for data collection, choose the one an observer could see and count.
Common mistake
Writing vague labels such as “aggressive” or “upset” instead of observable, measurable actions anyone could count.
Quick check
A definition is operational when two observers would agree on whether it occurred. Is “Sam is frustrated” operational? No. “Sam throws materials onto the floor” is.
Keep studying
RBT glossary · ABC data · Discontinuous measurement · Functions of behavior · Flashcards · Study guide
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