International Day Of Women in Statistics and Data Science: Full Schedule

Registration opens August 15th at www.idwsds.org.

You will be able to validate your attendance (Check-In to sessions) using your personal schedule.

arrow_back View All Dates

00:30 UTC

S102 - Gini-Weighted Risk Control in Adaptive Generative Augmentation

Tuesday October 6, 2026 00:30 - 01:00 UTC

Generative data augmentation is widely used to address class imbalance by enriching minority classes with synthetic samples. Existing approaches typically employ a fixed augmentation strength across all classes, ignoring differences in class imbalance, data structure, and generative quality. We propose an adaptive augmentation framework that determines class-specific augmentation strengths using both class proportions and structural information measured through Gini correlation. This strategy allocates more synthetic data to underrepresented and weakly structured classes while limiting augmentation for well-represented classes.

We develop a theoretical framework showing that the resulting excess risk is controlled by a weighted combination of class-conditional Wasserstein discrepancies and Gini-based structural factors. We further establish consistency results and demonstrate that adaptive augmentation provides tighter control of risk distortion than fixed augmentation schemes.

Experiments on imbalanced classification datasets show consistent improvements in minority-class recall and macro-F1 performance, while empirical results closely match theoretical predictions. The proposed framework provides a principled, structure-aware foundation for generative data augmentation.

Speakers

Chathurika Abeykoon

Assistant professor of Mathematics and Statistics, Rhodes College

Chathurika Abeykoon is an Assistant Professor of Statistics at Rhodes College, Memphis, TN. Dr. Abeykoon received her Ph.D. in Mathematics with a concentration in Statistics from the University of Mississippi in 2023. Her research lies at the intersection of Mathematics, Statistics... Read More →

Organizers

Chathurika Abeykoon

Assistant professor of Mathematics and Statistics, Rhodes College

Tuesday October 6, 2026 00:30 - 01:00 UTC
Zoom Room #1

Plenary Talk, Technical Statistical Session

Country United States
Session ID 102

International Day Of Women in Statistics and Data Science

00:30 UTC

Chathurika Abeykoon

Chathurika Abeykoon

Get help with the event