Markov Keyboard: keyboard layout that changes by Markov frequency (2019)

Dynamic / Markov-Based Layouts

• Many find the idea of a layout that reorders keys by Markov (or similar) prediction intellectually appealing and “rabbit hole”–worthy.
• Some compare it to autocomplete: if probabilities reset at each word and use a static table, users might learn the pattern, with most letters reachable from the home row.
• Others argue that constantly moving keys destroys muscle memory, adds visual search time, and is impractical for everyday touch typing.

Prediction, Personalization & Assistive Tech

• Several comments suggest using more advanced or personalized language models (e.g., PPM, recurrent models) trained on the user’s own text to improve predictions.
• There is interest in using next-letter prediction for scanning or switch-based access, where efficiency gains could be large. Ideas include:
  • Scanning letters in order of likelihood rather than fixed order.
  • Showing word predictions directly on keys.
  • Highlighting or lighting only likely next letters or classes (e.g., vowels).

Security-Oriented Randomization

• Randomized on‑screen or physical keypads are already used for PIN entry (ATMs, doors, online banking) to defeat “clean key,” shoulder-surfing, and thermal attacks.
• Discussion includes combinatorics of inferring codes from which keys are dirty/clean, and notes that random layouts cut the search space but don’t eliminate it.
• A possible “timing attack” is noted: longer seek time to displaced digits could leak information. Proposed mitigation: enforce fixed pacing between layout reveal and input.

Ergonomics, Muscle Memory & Alternative Layouts

• Multiple commenters discuss long, difficult transitions to static alternative layouts (Dvorak, Colemak, Neo, custom designs) and RSI motivations.
• Opinions differ: some say layout switching is extremely hard and productivity-killing; others report relatively quick adaptation and easy switching back to QWERTY.
• Dynamic layouts are criticized as even worse for muscle memory than static alternatives.

Beyond Traditional Keyboards & Hardware Ideas

• Suggestions include analog keypress levels (e.g., half-press vs full-press), multi-function thumb clusters, chorded devices, handwriting or shorthand on touchpads, and systems like Dasher or chorded input via musical instruments.
• Dynamic key legends (LCD/OLED/e‑ink per key or screen-under-keys) are seen as enabling technology for Markov keyboards.
• Some explore DIY keycap production (injection molding, 3D printing) to support custom layouts.