Questions tagged [test-datasets]

For questions related to test (or testing) datasets in the context of machine learning. A test dataset is any dataset that is not used for training the model but just to evaluate it, in particular, its ability to generalize to unseen data.

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What does it mean by overfitting the test set?

Consider the following statement from p14 of Naive Bayes and Sentiment Classification While the use of a devset avoids overfitting the test set, having a fixed training set, devset, and test set ...
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27 views

Are the held-out datasets used for testing, validation or both?

I came across a new term "held-out corpora" and I confused regarding its usage in the NLP domain Consider the following three paragraphs from N-gram Language Models #1: held-out corpora as a ...
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55 views

What are possible ways to combat overfitting or improve the test accuracy in my case?

I have asked a question here, and one of the comments suggested that this is a case of severe overfitting. I made a neural network, which uses residual boosting (which is done via a KNN), and I am ...
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Why doesn't U-Net work with images different from the dataset?

I have implemented a U-Net, similar to this implementation, but for a different dataset, this one, to segment roads. It works fine using the test folder images, but, for example, when I pick a print ...
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Is there a way, while training (with contrastive learning) the embedding network, to find the test accuracy?

I aim to do action recognition in videos on a private dataset. To compare with the existing state-of-the-art implementations, other guys published their code on Github, like the one here (for the ...
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1answer
33 views

How to build a test set for a model in industry?

Most of the tutorials only teach us to split the whole dataset into three parts: training set, develop set, and test set. But in the industry, we are kind of doing test-driven development, and what ...
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1answer
75 views

How do I select the (number of) negative cases, if I'm given a set of positive cases?

We were given a list of labeled data (around 100) of known positive cases, i.e. people that have a certain disease, i.e. all these people are labeled with the same class (disease). We also have a much ...
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1answer
340 views

How to perform PCA in the validation/test set?

I was using PCA on my whole dataset (and, after that, I would split it into training, validation, and test datasets). However, after a little bit of research, I found out that this is the wrong way to ...
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68 views

What are “development test sets” used for?

This is a theoretical question. I am a newbie to artificial intelligence and machine learning, and the more I read the more I like this. So far, I have been reading about the evaluation of language ...