Answer:
- gradually stopped responding to the tone.
Step-by-step explanation:
According to Pavlov's theory of 'Classical Conditioning,' the dog's conditioned response of salivating on hearing the tone of a metronome will decrease and eventually disappear if he continues to offer the tone without giving food. This shows that the conditioned response will reappear for a short-period only if the conditioned stimulus returns. He also displayed that after a specific rest period, the extinct conditioned response reappears which he called 'spontaneous recovery of conditioned response.'