MANTIS at #SMM4H 2023: Leveraging Hybrid and Ensemble Models for
  Detection of Social Anxiety Disorder on Reddit
Sourabh Zanwar Daniel Wiechmann Yu Qiao Elma Kerz
This paper presents our system employed for the Social Media Mining for
Health 2023 Shared Task 4: Binary classification of English Reddit posts
self-reporting a social anxiety disorder diagnosis. We systematically
investigate and contrast the efficacy of hybrid and ensemble models that
harness specialized medical domain-adapted transformers in conjunction with
BiLSTM neural networks. The evaluation results outline that our best performing
model obtained 89.31% F1 on the validation set and 83.76% F1 on the test set.