Adaptation in training refers to which phenomenon?

• A. Increased performance with repetition
• B. Random variation in behavior
• C. Response fatigue — neurons become less responsive
• D. Immediate extinction after reward

Answer: (C)

Adaptation in training describes the nervous system’s response to repeated exposure to the same stimulus: neurons become less responsive over time, a kind of response fatigue. In practice this means that if you present the same cue or stimulus repeatedly, its salience wanes and the dog may show a reduced or slower response. This helps explain why simply repeating the same training cue without variation can lead to diminishing returns—the stimulus loses impact at the neural level, so learning can stall unless you vary the cue, change the context, or space out sessions to keep the dog engaged.

This differs from simply getting better with repetition, which would be a practice or learning gain without the neural responsiveness dropping. It isn’t about random fluctuations in behavior, which are normal variability rather than a systematic reduction in responsiveness. And it isn’t about extinction after reward, which is the cessation of a behavior due to lack of reinforcement; adaptation describes how the brain’s response to a stimulus itself fades, not the outcome of the reinforcement pattern.