Research by Pam Mueller and Daniel Oppenheimer found that students who take notes by hand tend to have a deeper understanding of the material and better retention than those who take notes using laptops. This is because writing by hand requires more cognitive processing and summarization, whereas typing on a laptop can lead to mindless transcription. The study suggests that the benefits of longhand notes are due to the conceptual processes they evoke, rather than just the act of writing itself. This has implications for students who use laptops to access lecture outlines and notes, as they may be missing out on the opportunity to engage in mental work that supports learning.