Automated speech- and text-based classification of neuropsychiatric conditions in a multidiagnostic setting

• URL: http://arxiv.org/abs/2301.06916v1
• Date: Fri, 13 Jan 2023 08:24:21 GMT
• Title: Automated speech- and text-based classification of neuropsychiatric conditions in a multidiagnostic setting
• Authors: Lasse Hansen, Roberta Rocca, Arndis Simonsen, Alberto Parola, Vibeke Bliksted, Nicolai Ladegaard, Dan Bang, Kristian Tyl\'en, Ethan Weed, S{\o}ren Dinesen {\O}stergaard, Riccardo Fusaroli
• Abstract summary: Speech patterns have been identified as potential diagnostic markers for neuropsychiatric conditions. We tested the performance of a range of machine learning models and advanced Transformer models on both binary and multiclass classification. Our results indicate that models trained on binary classification may learn to rely on markers of generic differences between clinical and non-clinical populations.
• Score: 2.0972270756982536
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Speech patterns have been identified as potential diagnostic markers for neuropsychiatric conditions. However, most studies only compare a single clinical group to healthy controls, whereas clinical practice often requires differentiating between multiple potential diagnoses (multiclass settings). To address this, we assembled a dataset of repeated recordings from 420 participants (67 with major depressive disorder, 106 with schizophrenia and 46 with autism, as well as matched controls), and tested the performance of a range of conventional machine learning models and advanced Transformer models on both binary and multiclass classification, based on voice and text features. While binary models performed comparably to previous research (F1 scores between 0.54-0.75 for autism spectrum disorder, ASD; 0.67-0.92 for major depressive disorder, MDD; and 0.71-0.83 for schizophrenia); when differentiating between multiple diagnostic groups performance decreased markedly (F1 scores between 0.35-0.44 for ASD, 0.57-0.75 for MDD, 0.15-0.66 for schizophrenia, and 0.38-0.52 macro F1). Combining voice and text-based models yielded increased performance, suggesting that they capture complementary diagnostic information. Our results indicate that models trained on binary classification may learn to rely on markers of generic differences between clinical and non-clinical populations, or markers of clinical features that overlap across conditions, rather than identifying markers specific to individual conditions. We provide recommendations for future research in the field, suggesting increased focus on developing larger transdiagnostic datasets that include more fine-grained clinical features, and that can support the development of models that better capture the complexity of neuropsychiatric conditions and naturalistic diagnostic assessment.

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