Master anything withscientific precision

// Gradual's Spaced Repetition Algorithm
function calculateNextReviewDate(
  difficulty: number,  // 0-1 scale of item difficulty
  consecutiveCorrect: number,  // number of times correctly recalled
  lastInterval: number  // previous interval in days
): number {
  const baseMultiplier = 2.5;
  const difficultyFactor = 1 - (difficulty * 0.5);
  const correctnessFactor = Math.min(2, 1 + (consecutiveCorrect * 0.2));
  
  // Calculate new interval with exponential backoff
  const newInterval = lastInterval * baseMultiplier * 
                      difficultyFactor * correctnessFactor;
                      
  // Apply randomization to prevent clustering
  const jitter = 0.95 + (Math.random() * 0.1);
  
  return Math.round(newInterval * jitter);
}