Author

Serli Kopar

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Open access Aug 2026

Identification and phenotypic profiling of subgroups with distinct cognitive aging trajectories.

Cognitive aging is shaped by genetic variation, environmental factors, and health-related conditions. Until now, it is largely unclear why some individuals maintain their cognitive function, and others show progressive cognitive decline. This study uncovered determinants of distinct cognitive aging trajectories in the...

L. Federmann, Christian Mychajliw, U. Suenkel et al. · GeroScience · 0 citations

#machine learning Preprint Oct 2026

Beyond Decodability: Do Acoustic Factors Drive Predictions in Speech-Based Alzheimer's Assessment?

Speech-based Alzheimer's disease (AD) assessments increasingly rely on pretrained self-supervised learning (SSL) models that learn acoustic representations directly from raw audio, exposing the model to recording factors. We ask whether such factors are merely encoded in SSL representations or can systematically alter...

Serli Kopar, Alkis Koudounas, R. Rane et al. · 0 citations

Preprint Aug 2026

Motor, Cognitive, or Corpus? What Survives Cross-Lingual Transfer in Speech-Based Parkinsons Disease Detection

A layer-wise analysis of nine SSL speech backbones using a low-capacity logistic regression probe reveals that the transferred discriminative signal lacks pathological specificity, highlighting critical limitations that must be addressed before speech-based pathology recognition models can be reliably deployed in clini...

Serli Kopar, Sam Gijsen, Abner Hernandez et al. · 0 citations