When a tone is sounded a baby's right cheek is touched and the baby reflexively turns its head to the direction of the touch. After several pairings the baby turns its head to the right as soon as it?

hears the tone, even without the cheek being touched. This behavior illustrates classical conditioning, where the baby learns to associate the sound of the tone with the tactile stimulus on the cheek. The tone becomes a conditioned stimulus, prompting a conditioned response (turning the head) in anticipation of the touch. This demonstrates the baby's ability to learn and adapt based on experiences.