Three-Year-Old Jake Ran Up to the Neighbor's New Lab Puppy

Three-year-old Jake ran up to the neighbor's new lab puppy.The puppy barked loudly and playfully jumped up on Jake, knocking him down.Although he was not hurt, the experience did frighten Jake.The next time he saw another lab puppy in the park, he hugged his mother's knees and began to cry.The puppy would be the conditioned stimulus in this example.