CONDITIONED REFLEX

Under classical conditioned reflex,  the learned response to the previously neutral stimulus the conditioned response is. For example, the smell of food naturally elicits the feeling of hunger. If a whistle is blown any time food is presented, the sound of the whistle gets associated with the food. It gets to a time when you naturally get hungry any time  the whistle is blown without the physical presence of food. The smell of food is the unconditioned stimulus. The feeling of hunger in response to the the smell is the unconditioned response and the sound of the whistle is the conditioned stimulus. The conditioned response would be feeling hungry when you hear the sound of the whistle.

More examples of conditioned reflex:
1. A child who receives an injection from a person in white coat may associate any white coat with the pain of injection. Any time the child see a person in white coat, he/she suddenly develops fear and avoidance reaction.

2. John and Mercy, who are students, are in love with each other but they attend schools several mile apart. During the spring and summer breaks, they spend time together picking grapes. When they get back to their schools John experiences the feeling of happiness any time he sees grapes.