On the Validity of Head Motion Patterns as Generalisable Depression Biomarkers

• URL: http://arxiv.org/abs/2505.23427v1
• Date: Thu, 29 May 2025 13:22:30 GMT
• Title: On the Validity of Head Motion Patterns as Generalisable Depression Biomarkers
• Authors: Monika Gahalawat, Maneesh Bilalpur, Raul Fernandez Rojas, Jeffrey F. Cohn, Roland Goecke, Ramanathan Subramanian,
• Abstract summary: This work examines the effectiveness and generalisability of models utilising elementary head motion units, termed kinemes, for depression severity estimation.<n>We consider three depression datasets from different western cultures to investigate the generalisability of the derived kineme patterns.<n>Our results show that: (1) head motion patterns are efficient biomarkers for estimating depression severity, achieving highly competitive performance for both classification and regression tasks.
• Score: 5.251042759836316
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Depression is a debilitating mood disorder negatively impacting millions worldwide. While researchers have explored multiple verbal and non-verbal behavioural cues for automated depression assessment, head motion has received little attention thus far. Further, the common practice of validating machine learning models via a single dataset can limit model generalisability. This work examines the effectiveness and generalisability of models utilising elementary head motion units, termed kinemes, for depression severity estimation. Specifically, we consider three depression datasets from different western cultures (German: AVEC2013, Australian: Blackdog and American: Pitt datasets) with varied contextual and recording settings to investigate the generalisability of the derived kineme patterns via two methods: (i) k-fold cross-validation over individual/multiple datasets, and (ii) model reuse on other datasets. Evaluating classification and regression performance with classical machine learning methods, our results show that: (1) head motion patterns are efficient biomarkers for estimating depression severity, achieving highly competitive performance for both classification and regression tasks on a variety of datasets, including achieving the second best Mean Absolute Error (MAE) on the AVEC2013 dataset, and (2) kineme-based features are more generalisable than (a) raw head motion descriptors for binary severity classification, and (b) other visual behavioural cues for severity estimation (regression).

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