Mr. Martinez is working with several middle school students who are reading at a second-grade or third-grade level. The students have shown little interest in reading materials that have been specifically designed to help them improve basic skills in phonics and reading comprehension. However, when Mr. Martinez instead gives them easy-to-read adventure and science fiction novels, they start reading regularly and even ask to take the books home so that they can continue reading after school. Is reinforcement occurring in this situation? Explain your decision.