Plain English Meaning
Something happens, and you react to it. When that pairing is repeated enough, the reaction becomes automatic.
Full Definition
A learning model in which a specific input (stimulus) reliably produces a specific reaction (response). Through repeated pairing, the learner builds an automatic link so the response occurs whenever the stimulus appears. In flight training, this principle underlies how pilots develop quick, consistent reactions to sights, sounds, and instrument indications.
Context Anchor
Seen in instructor training when discussing how students learn from cockpit signals, instructor questions, aircraft feel, and repeated practice.
Derivation
Stimulus comes from Latin meaning a goad or prod -- something that pushes a reaction. Response comes from Latin respondere, meaning to answer . Together they a prompt and the answer it produces.