Who is the father of classical conditioning?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

stimulus that causes automatic response

learned reaction

What did the father of classical conditioning study to observe this phenomena?

learned stimulus

stimulus that doesn’t trigger a response

What has cities, but no houses; forests, but no trees; and water, but no fish?

A woman shoots her husband. Then she holds him under water for over 5 minutes. Finally, she hangs him. But 5 minutes later they both go out together and enjoy a wonderful dinner together. How can this be?

automatic reaction