Ivan Pavlov, born on September 14, 1849, was awarded the Nobel Prize in Physiology or Medicine in 1904 for his work on digestive secretions and is known for developing the concept of classical conditioning. This process involves associating a neutral stimulus with an unconditioned stimulus to elicit a conditioned response and has educational implications for language learning and habit formation. However, the limitations of conditioning theory suggest it cannot fully explain complex learning and higher-order cognitive processes.