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Home / Proceedings / Proceedings of the AAAI Conference on Artificial Intelligence, 35 / No. 13: AAAI-21 Technical Tracks 13

Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization

February 1, 2023

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Authors

Kentaro Kanamori

Hokkaido University


Takuya Takagi

Fujitsu Laboratories Ltd.


Ken Kobayashi

Fujitsu Laboratories Ltd. Tokyo Institute of Technology


Yuichi Ike

Fujitsu Laboratories Ltd.


Kento Uemura

Fujitsu Laboratories Ltd.


Hiroki Arimura

Hokkaido University


DOI:

10.1609/aaai.v35i13.17376


Abstract:

Post-hoc explanation methods for machine learning models have been widely used to support decision-making. One of the popular methods is Counterfactual Explanation (CE), also known as Actionable Recourse, which provides a user with a perturbation vector of features that alters the prediction result. Given a perturbation vector, a user can interpret it as an "action" for obtaining one's desired decision result. In practice, however, showing only a perturbation vector is often insufficient for users to execute the action. The reason is that if there is an asymmetric interaction among features, such as causality, the total cost of the action is expected to depend on the order of changing features. Therefore, practical CE methods are required to provide an appropriate order of changing features in addition to a perturbation vector. For this purpose, we propose a new framework called Ordered Counterfactual Explanation (OrdCE). We introduce a new objective function that evaluates a pair of an action and an order based on feature interaction. To extract an optimal pair, we propose a mixed-integer linear optimization approach with our objective function. Numerical experiments on real datasets demonstrated the effectiveness of our OrdCE in comparison with unordered CE methods.

Topics: AAAI

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HOW TO CITE:

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization Proceedings of the AAAI Conference on Artificial Intelligence (2021) 11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization AAAI 2021, 11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura (2021). Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization. Proceedings of the AAAI Conference on Artificial Intelligence, 11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization. Proceedings of the AAAI Conference on Artificial Intelligence 2021 p.11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. 2021. Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization. "Proceedings of the AAAI Conference on Artificial Intelligence". 11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. (2021) "Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization", Proceedings of the AAAI Conference on Artificial Intelligence, p.11564-11574

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura, "Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization", AAAI, p.11564-11574, 2021.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. "Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization". Proceedings of the AAAI Conference on Artificial Intelligence, 2021, p.11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. "Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization". Proceedings of the AAAI Conference on Artificial Intelligence, (2021): 11564-11574.

Kentaro Kanamori||Takuya Takagi||Ken Kobayashi||Yuichi Ike||Kento Uemura||Hiroki Arimura. Ordered Counterfactual Explanation by Mixed-Integer Linear Optimization. AAAI[Internet]. 2021[cited 2023]; 11564-11574.


ISSN: 2374-3468


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