Pam Mueller (Princeton) and Daniel Oppenheimer (UCLA) ran the landmark 2014 study. Students took lecture notes by hand or on a laptop. Laptop notes were more complete, often verbatim. A week later, on conceptual questions, handwriters outperformed laptop users substantially.
The hand is slower. Slowness forces selection. Selection is processing. Processing is encoding. It is not that handwriting is better input than typing — it is that the bottleneck of the hand protects the mind from shallow transcription.
Audrey van der Meer’s 2020 EEG work made the mechanism visible. Handwriting recruits broad sensorimotor, visual and linguistic networks; typing engages a narrow subset. More active networks at encoding means more retrieval routes later. Fluera’s engine was built to preserve this — not as aesthetic homage but as load-bearing pedagogy.