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#artificial intelligence Preprint Sep 2026

Counterfactual Marginalisation: Framework for Evaluating Robustness to Nuisance Variables

Machine learning models can achieve strong test performance while relying on demographic or acquisition-related shortcuts. We propose counterfactual (CF) marginalisation as a test-time evaluation procedure for assessing robustness of classification models to such variables. Given a CF image generator, we intervene on n...

Yasin Ibrahim, Hermione Warr, R. Evans et al. · 0 citations
Open access Jul 2026

Sex and menstrual cycle differences in the mood-activity association should inform cycle-aware digital phenotyping

Passive physical activity is increasingly used as a digital-phenotyping proxy for mood, assuming a stable relationship across people and time. We tested this assumption using daily mood and activity data from 1,072 individuals (121 women, 951 men; 13,909 person-days) in the Juli app. The within-person activity-mood ass...

K. Delray, J. K. Zeitler, J. Hayes et al. · 0 citations

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