Definition

General Notation (DAS3H: Modeling Student Learning and Forgetting for Optimally Scheduling Distributed Practice of Skills)

In this paper, the following general notation is used:

  1. Students are indexed by s[1,S]s \in [1, S]
  2. Items: j[1,J]j \in [1, J]
  3. Skills: k[1,K]k \in [1, K]
  4. Timestamps: tR+t \in \mathbb{R}^{+} (in days)
  5. Correctness of the answer: Ys,j,t{0,1}Y_{s, j, t} \in \{0, 1\}
  6. Logistic function: σ=11+exp(x)\sigma = \frac{1}{1 + \exp(-x)}

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Updated 2026-05-09

Tags

Data Science