Concept-level Debugging of Part-Prototype Networks

• URL: http://arxiv.org/abs/2205.15769v1
• Date: Tue, 31 May 2022 13:18:51 GMT
• Title: Concept-level Debugging of Part-Prototype Networks
• Authors: Andrea Bontempelli, Stefano Teso, Fausto Giunchiglia, Andrea Passerini
• Abstract summary: Part-prototype Networks (ProtoPNets) are concept-based classifiers designed to achieve the same performance as black-box models without compromising transparency. We propose a concept-level debugger for ProtoPNets in which a human supervisor supplies feedback in the form of what part-prototypes must be forgotten or kept.
• Score: 27.700043183428807
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Part-prototype Networks (ProtoPNets) are concept-based classifiers designed to achieve the same performance as black-box models without compromising transparency. ProtoPNets compute predictions based on similarity to class-specific part-prototypes learned to recognize parts of training examples, making it easy to faithfully determine what examples are responsible for any target prediction and why. However, like other models, they are prone to picking up confounds and shortcuts from the data, thus suffering from compromised prediction accuracy and limited generalization. We propose ProtoPDebug, an effective concept-level debugger for ProtoPNets in which a human supervisor, guided by the model's explanations, supplies feedback in the form of what part-prototypes must be forgotten or kept, and the model is fine-tuned to align with this supervision. An extensive empirical evaluation on synthetic and real-world data shows that ProtoPDebug outperforms state-of-the-art debuggers for a fraction of the annotation cost.

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