Definition
The first of the three parts of a performance-based objective. It states clearly what the learner will be able to do at the end of instruction, expressed as an observable action such as identify, demonstrate, list, calculate, or perform.
Plain English
It is the part of a training objective that says exactly what the student will be able to do once they have learned it.
Context Anchor
Seen when aviation instructors write lesson objectives, plan training, or explain what a student is expected to demonstrate during a lesson.
Derivation
Description comes from a Latin idea meaning “to write down” or “set out in words.” Behavior comes from the idea of how someone acts. Together, the phrase points to a written statement of the action the learner must show, not just a general topic to study.
Why Pilots Care
It keeps training objectives focused on observable, measurable actions rather than vague intentions.
Intuition Check
Do not read “behavior” here as personality, attitude, or general conduct. In this context, it means a specific action the learner must be able to show.
Example Sentence 1
The description of the skill or behavior for this lesson is 'demonstrate a normal takeoff and climb.'
Example Sentence 2
Each performance-based objective begins with a clear description of the skill or behavior before adding conditions and criteria.