drug-stance-bert

This model is a fine-tuned version of cardiffnlp/twitter-roberta-base-sentiment on COVID-CQ, a dataset that contains 3-label annotated opinions (negative, neutral, and positive) of the tweet initiators regarding the use of Chloroquine or Hydroxychloroquine for the treatment or prevention of the coronavirus.

Intended uses & limitations

Predict opinions (negative, neutral, and positive) of tweet initiators regarding the use of a drug for the treatment or prevention of the coronavirus. Note that having multiple drug names with different stances in a single tweet can confuse the model.

Inference & understanding

We followed COVID-CQ to use the following label representation:

• 0 -> None/Neutral;
• 1 -> Against;
• 2 -> Favor

Try these examples:

• The gov's killing people by banning Ivm
• Great news cheers everybody:) ivermectin proven to not work by rct lol

Tutorial

See our Github repo for inference scripts

Model description

"We developed two COVID-drug-stance RoBERTa-base models by fine-tuning a pre-trained Twitter-specific stance detection model on a stance data set called COVID-CQ. The data were divided into training-dev-test validation datasets with a 70:10:20 ratio. Model I (COVID-drug-stance-BERT) was trained on the original tweet data, and Model II (COVID-drug-stance-BERT-masked) was trained on tweets with drug names masked as “[mask]” for model generalizability on different drugs. The two models had similar performance on the COVID-19 validation set: COVID-drug-stance-BERT had an accuracy of 86.88%, and the masked model had an accuracy of 86.67%. The two models were then evaluated by predicting tweet initiators’ attitudes towards the drug mentioned in each tweet using randomly selected test sets (100 tweets) of each drug (Hydroxychloquine, Ivermectin, Molnupiravir, Remdesivir). As suggested by the evaluation in Table 2, Model I had better performance and was therefore used in this study".

Drug	Model I: Original Tweet			Model II: Drug Names Masked
	Precision	Recall	F1-Score	Precision	Recall	F1-Score
Hydroxychloroquine	0.93	0.92	0.92	0.84	0.83	0.83
Ivermectin	0.92	0.91	0.91	0.72	0.68	0.68
Molnupiravir	0.89	0.89	0.89	0.78	0.77	0.77
Remdesivir	0.82	0.79	0.79	0.70	0.66	0.66

The model uploaded here is Model I.

Training and evaluation data

COVID-CQ

Training procedure

See Github

Training hyperparameters

The following hyperparameters were used during training:

• learning_rate: 5e-05
• train_batch_size: 24
• eval_batch_size: 24
• seed: 42
• optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
• lr_scheduler_type: linear
• num_epochs: 3.0

Framework versions

• Transformers 4.11.0
• Pytorch 1.8.1+cu102
• Datasets 1.15.1
• Tokenizers 0.10.3