After five repetitions, most Quantum Country readers reach at least 1 month of demonstrated retention for at least 95% of questions

We have enough samples now to look at five complete repetitions of QCVC past in-essay—at least for 83 aggressiveStart users. 20210323151041

(updated 2021-11-24))

• Median question (25th/50th/75th %ile reader), Demonstrated retention by repetition number, in days:
  • 1: 7 / 8 / 9
  • 2: 17 / 19 / 21
  • 3: 34 / 40 / 44
  • 4: 68 / 77 / 86
  • 5: 103 / 150 / 169
• 25th %ile question:
  • 1: 5 / 6 / 8
  • 2: 14 / 15 / 19
  • 3: 20 / 31 / 37
  • 4: 37 / 52 / 75
  • 5: 70 / 88 / 139
• 10th %ile question:
  • 1: 5 / 5 / 5
  • 2: 8 / 10 / 14
  • 3: 12 / 17 / 22
  • 4: 19 / 30 / 46
  • 5: 26 / 45 / 81
• 5th %ile question:
  • 1: 5 / 5 / 5
  • 2: 6 / 7 / 10
  • 3: 8 / 12 / 16
  • 4: 12 / 19 / 27
  • 5: 17 / 31 / 48

So after four repetitions, the median user has >=90% of their questions >= 1 month demonstrated retention, and that’s true for >= 95% after five repetitions. The 25th %ile user has >= 95% of their questions at >= 17 days and >= 75% at >= 70 days. That’s quite solid.