Pseudo-Label Augmentation for Affect Sensing in Small Collaborative Groups

Meisam Jamshidi Seikavandi; Tanya Ignatenko; Fabricio Batista Narcizo; Paolo Burelli; Jesper Bünsow Boldt; Andrew Burke Dittberner

arXiv · 2609.16077

Pseudo-Label Augmentation for Affect Sensing in Small Collaborative Groups

Meisam Jamshidi Seikavandi·Tanya Ignatenko·Fabricio Batista Narcizo·Paolo Burelli·Jesper Bünsow Boldt·Andrew Burke Dittberner

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Abstract

Physiological affect sensing in naturalistic group interaction is often limited by sparse labels rather than sensor data: wearable devices produce many time windows, while self-reports are collected only a few times per session. Using GroupAffect-4, a four-person collaborative dataset with wearable physiology, eye tracking, Big Five personality, and post-task VAD labels, we study pseudo-label augmentation for affect sensing under sparse supervision. We compare no augmentation, Gaussian Process pseudo-labelling, personality-aware trust weighting, and joint personality-plus-confidence weighting within a shared target-construction pipeline. Results show that pseudo-label augmentation improves over the labelled-only baseline in the known-team setting. However, the narrow range of Big Five cosine similarities (0.91-0.99) makes fine-grained personality weighting ineffective; personality similarity functions mainly as a same-team filter rather than a calibrated trust signal. With smoothing, augmented SVM variants are effectively tied on Valence and Arousal, while the joint personality-plus-confidence variant gives the highest Dominance score. Cross-subject LOSO transfer remains encouraging, especially for Arousal, whereas strict session-isolated LOGO removes the augmentation benefit. Given only 10 groups, LOGO should be interpreted as a conservative lower bound on unseen-group transfer. Overall, the results suggest that pseudo-label augmentation can make better use of sparsely labelled collaborative affect data, while personality information is most useful as a within-team selection mechanism.

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Meisam Jamshidi Seikavandi, Tanya Ignatenko, Fabricio Batista Narcizo, Paolo Burelli, Jesper Bünsow Boldt, Andrew Burke Dittberner. 2026-09-13. Pseudo-Label Augmentation for Affect Sensing in Small Collaborative Groups. https://arxiv.org/abs/2609.16077

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