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

learned stimulus

stimulus that causes automatic response

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?

Who is the father of classical conditioning?

automatic reaction

learned reaction

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?

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

stimulus that doesn’t trigger a response