Birds Exposure Training

- A perceptual exposure binary-choice UI learning tool for recognizing birds

• ⛁ birds-exposure-training
• ah, I remember now: this fails due to quickly exceeding some flickr quota

Lessons Learned

• regarding auto-gen wrong answers:

  • trial also tells you something about learners knowledge of the other item
  • if you use ebisu, and a wrong item keeps coming up, pure frequency can give you a hint that this is the right answer
    • therefor, mix in the least-likely-remembered item as the wrong answer for a random new item

• main learnings:

  • binary choice in learning apps has implications for both items
  • ⁓ if you repeat a learning item in multiple choice rapidly, user can correctly guess answer just by how often they see it
  • use urgent or due items for all choices of multiple choice
  • ~ you need learning data to know what hard choices for multiple choices could be
  • ⁓ tracking stuff like 'trailing success rate' or 'streak correct' doesn't make sense if SR is counteracting
  • there is also an old blog post somewhere: The Unique Dynamics of a Rapid Spaced Repetition, Binary-Choice, Perceptual Learning App