MINDS & CIS Fall Seminar Series: Yoav Wald, “Towards Invariant Learning”

/ August 19, 2022/

When:
August 30, 2022 @ 12:00 pm – 1:15 pm
2022-08-30T12:00:00-04:00
2022-08-30T13:15:00-04:00

Abstract: Modern machine learning models seem to be improving on a daily basis, but still fail to generalize on out-of-distribution (OOD) data. To overcome this challenge, many techniques have been proposed, often focused on learning models with certain invariance properties. Unfortunately, so far these attempts have had limited success scaling to realistic high-dimensional data, and in learning truly invariant representations. The main part of the talk will cover work that proposes an alternative and relatively simple approach, drawing a link between OOD performance and model calibration. We argue that calibration across multiple domains can be viewed as a type of invariance that helps discard spurious correlations, hence leading to better OOD generalization. This leads us to propose multi-domain calibration as a measurable and trainable surrogate for the OOD performance of a classifier. Building on our theoretical and empirical findings, the rest of the talk will cover ongoing and recently completed research on aspects of invariant learning.

Biography: Yoav is a postdoctoral fellow at Johns Hopkins’ Whiting School of Engineering, working on safe and robust machine learning with applications in Healthcare. He completed his PhD at the Hebrew University of Jerusalem, where he was advised by Amir Globerson. During his PhD Yoav was also a researcher at Google Research, where he built methods for explaining computer vision models. He co-organized the workshop on Spurious Correlations, Invariance and Stability (SCIS) in ICML 2022.

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