Table 2 Meaning of symbols used in TI-BETM
From: Topic tracking model for analyzing student-generated posts in SPOC discussion forums
Symbols | Description | Symbols | Description |
|---|---|---|---|
M | Number of posts | α | Dirichlet prior of θ |
N | Number of words | β | Dirichlet prior of φ |
K | Number of topics | γ | Dirichlet prior of π |
z | Topic index | η | Dirichlet prior of ψ |
e | Emotion index | λ | Dirichlet prior of ζ |
b | Behavior index {TP, RE, QU, CP} | θ | Distribution of post-topic |
w | Word index | φ | Distribution of topic-word |
t | Time index | π | Bernoulli distribution of topic-emotion |
ζ | Distribution of topic-time | ψ | Distribution of topic-behavior |