Which of the following statistics is NOT used for evaluating topic models:

Question

BlackTom AI · Accepted Answer

To evaluate topic models, researchers rely on several quantitative measures that reflect how well the model fits the data and how meaningful the topics are. 
Option 1: 'Log-likelihood score' — This is a foundational statistic in probabilistic topic models (like LDA) that measures how likely the observed data are under the model; higher log-likelihood generally indicates a better fit, so it is commonly used in evaluation and model selection. 
Option 2: 'Gini index' — The Gini index is a measure of inequality or sparsity often used in economics or in some machine learning contexts to quantify class imbalance, but it is not a standard metric for evaluating topic models. It does not directly assess topic coherence, coherence of word distributions within topics, or the fit of the model to the data, making it an inappropriate choice for this purpose. 
Option 3: 'Perplexity score' — Perplexity is a widely used statistical measure in language modeling and topic modeling that assesses how well a probability model predicts a sample; in topic modeling, lower perplexity indicates a better model fit, though it is sometimes criticized for not always aligning with human interpretability. 
Option 4: 'Topic coherence' — Topic coherence measures how semantically interpretable or coherent the top words in a topic are, which is a key qualitative criterion and is routinely used to evaluate and compare topic models against human judgment. 
In summary, while log-likelihood, perplexity, and topic coherence are standard evaluation tools in topic modeling, the Gini index is not typically employed for this purpose, making it the item that does not belong among the listed statistics.

SP2025.B69.DAT.562.24 COMPLETE Quiz #5 AFTER VIDEO 4: Topic Modeling Evaluation

Which of the following statistics is NOT used for evaluating topic models:

查看解析

登录即可查看完整答案

类似问题

A human-centric method for evaluating a topic model where a random word is included into a topic is called:

How can we evaluate the performance of a topic model? Choose one best answer:

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

A product has a selling price of $20, a contribution margin ratio of 40% and fixed cost of $120,000. To make a profit of $30,000. The number of units that must be sold is: Type the number without $ and a comma. Eg: 20000

Which of the following statement regarding cost is correct:

Under the assumptions used in cost-volume-profit analysis, as the activity increases:

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单