Self-Supervision on Images and Text Reduces Reliance on Visual Shortcut FeaturesDownload PDF

28 May 2022, 15:03 (modified: 21 Jul 2022, 01:30)SCIS 2022 OralReaders: Everyone
Keywords: Machine Learning, Self-supervised learning, CLIP, Chest x-rays, Chest radiographs, Medical Imaging, Shortcut Learning, Synthetic Shortcuts, Integrated Gradients, Zero-shot classification, ICML
TL;DR: Self-supervised models trained on images and text are more resilient to visual shortcut features than traditional supervised CNNs.
Abstract: Deep learning models trained in a fully supervised manner have been shown to rely on so-called "shortcut" features. Shortcut features are inputs that are associated with the outcome of interest in the training data, but are either no longer associated or not present in testing or deployment settings. Here we provide experiments that show recent self-supervised models trained on images and text provide more robust image representations and reduce the model's reliance on visual shortcut features on a realistic medical imaging example. Additionally, we find that these self-supervised models "forget" shortcut features more quickly than fully supervised ones when fine-tuned on labeled data. Though not a complete solution, our experiments provide compelling evidence that self-supervised models trained on images and text provide some resilience to visual shortcut features.
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