❐ Chicken Sexing and Perceptual Learning as a Path to Expertise

• which sounds a lot like tacit knowledge, which the author acknowledges (and denies)
  • instead he calls it perceptual learning

also promotes exposure learning

see also:

• 📰 Putting Perceptual Exposure to Practice
• ❐ An Update on Perceptual Exposure as Learning Technique
• 📝 Perceptual Learning Modules in Flight Training