Fantastic Features and Where to Find Them: Detecting Cognitive Impairment with a Subsequence Classification Guided Approach

Ben Eyre, Aparna Balagopalan, Jekaterina Novikova


Abstract
Despite the widely reported success of embedding-based machine learning methods on natural language processing tasks, the use of more easily interpreted engineered features remains common in fields such as cognitive impairment (CI) detection. Manually engineering features from noisy text is time and resource consuming, and can potentially result in features that do not enhance model performance. To combat this, we describe a new approach to feature engineering that leverages sequential machine learning models and domain knowledge to predict which features help enhance performance. We provide a concrete example of this method on a standard data set of CI speech and demonstrate that CI classification accuracy improves by 2.3% over a strong baseline when using features produced by this method. This demonstration provides an example of how this method can be used to assist classification in fields where interpretability is important, such as health care.
Anthology ID:
2020.wnut-1.25
Volume:
Proceedings of the Sixth Workshop on Noisy User-generated Text (W-NUT 2020)
Month:
November
Year:
2020
Address:
Online
Editors:
Wei Xu, Alan Ritter, Tim Baldwin, Afshin Rahimi
Venue:
WNUT
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
193–199
Language:
URL:
https://aclanthology.org/2020.wnut-1.25
DOI:
10.18653/v1/2020.wnut-1.25
Bibkey:
Cite (ACL):
Ben Eyre, Aparna Balagopalan, and Jekaterina Novikova. 2020. Fantastic Features and Where to Find Them: Detecting Cognitive Impairment with a Subsequence Classification Guided Approach. In Proceedings of the Sixth Workshop on Noisy User-generated Text (W-NUT 2020), pages 193–199, Online. Association for Computational Linguistics.
Cite (Informal):
Fantastic Features and Where to Find Them: Detecting Cognitive Impairment with a Subsequence Classification Guided Approach (Eyre et al., WNUT 2020)
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PDF:
https://preview.aclanthology.org/nschneid-patch-1/2020.wnut-1.25.pdf
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 2020.wnut-1.25.OptionalSupplementaryMaterial.zip