Spaced Repetition System (SRS)
A learning technique that incorporates increasing intervals of time between subsequent review of previously learned material in order to exploit the psychological spacing effect.
Detailed Linguistic Background
Rooted in Hermann Ebbinghaus's 1885 discovery of the forgetting curve, spaced repetition demonstrates that human memory decays exponentially following initial exposure. If an item is reviewed just as it is about to be forgotten, the memory trace is significantly reinforced, and the rate of subsequent decay slows dramatically. In the 1970s, German scientist Sebastian Leitner popularised the box system: cards answered correctly move to boxes reviewed less frequently, while missed cards return to the daily review queue. In modern cognitive science, spaced retrieval is considered one of the most robust, empirically verified principles of human learning.
How nthoughts Implements This Principle
Unlike conventional vocabulary flashcard apps that serve pre-compiled wordlists, nthoughts applies Leitner spaced repetition exclusively to your real spoken mistakes. When you make a grammatical slip during a live dialogue with Maya, that exact error is packaged into a personal recall prompt and served at calibrated 1-day, 2-day, 4-day, 8-day, and 16-day intervals until permanently mastered.
Related Concepts in Language Learning
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