@article{usingvoiceandbiofeedbacktopredictuser,
  title = {Using Voice and Biofeedback to Predict User Engagement during Product Feedback Interviews},
  author = {Alessio Ferrari and Thaide Huichapa and Paola Spoletini and Nicole Novielli and Davide Fucci and Daniela Girardi},
  year = {2021},
  eprint = {2104.02410},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2104.02410v5},
}