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Making deep neural networks right for the right scientific reasons by interacting with their explanations

A preprint version of the article is available at arXiv.

Abstract

Deep neural networks have demonstrated excellent performances in many real-world applications. Unfortunately, they may show Clever Hans-like behaviour (making use of confounding factors within datasets) to achieve high performance. In this work we introduce the novel learning setting of explanatory interactive learning and illustrate its benefits on a plant phenotyping research task. Explanatory interactive learning adds the scientist into the training loop, who interactively revises the original model by providing feedback on its explanations. Our experimental results demonstrate that explanatory interactive learning can help to avoid Clever Hans moments in machine learning and encourages (or discourages, if appropriate) trust in the underlying model.

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Fig. 1: Explanatory interactive learning.
Fig. 2: Examples of correcting Clever Hans moments with XIL.
Fig. 3: Cluster strategy analysis.
Fig. 4: Spectral signatures of measured agar plates with sugar beet leaf discs.
Fig. 5: Results of the user study on trust development.

Data availability

The ML benchmark Fashion-MNIST is available at https://github.com/zalandoresearch/fashion-mnist. The PASCAL VOC2007 dataset is available at http://host.robots.ox.ac.uk/pascal/VOC/voc2007/. The RGB and HS data that support the findings of this study are available in the code repository https://doi.org/10.24433/CO.4559958.v1 (ref. 68). The user study is available at https://github.com/ml-research/xil/tree/master/Trust_Study.

Code availability

The code and a fully runnable capsule to reproduce the figures and results of this article, including pre-trained models, can be found at https://doi.org/10.24433/CO.4559958.v1 (ref. 68).

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Acknowledgements

S.T. and K.K. thank A. Vergari, A. Passerini, S. Kolb, J. Bekker, X. Shao and P. Morettin for very useful feedback on the conference version of this article. Furthermore, we thank F. Jäkel for support and supervision on the user study, C. Turan for providing the figure sketches and U. Steiner and S. Paulus for very useful feedback. P.S., A.K.M., A.B. and K.K. acknowledge the support by BMEL funds of the German Federal Ministry of Food and Agriculture (BMEL) based on a decision of the Parliament of the Federal Republic of Germany via the Federal Office for Agriculture and Food (BLE) under the innovation support programme, project DePhenSe (FKZ 2818204715). W.S. and K.K. were also supported by BMEL/BLE funds under the innovation support programme, project AuDiSens (FKZ 28151NA187). S.T. acknowledges the supported by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme, grant agreement no. 694980 SYNTH: Synthesising Inductive Data Models. X.S. and K.K. also acknowledge the support by the German Science Foundation project CAML (KE1686/3-1) as part of the SPP 1999 (RATIO). A.K.M. was partially funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy—EXC 2070 – 390732324

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Contributions

P.S., W.S., S.T. and K.K. designed the study. S.T. and K.K. designed and published the preliminary version of this manuscript16. P.S., W.S., X.S., S.T. and K.K. developed extensions of the basic XIL methods. P.S., W.S., A.B., A.K.M. and K.K. interpreted the data and drafted the manuscript. A.B. and P.S. designed the phenotyping dataset. A.B. and H.G.L. carried out the phenotyping dataset measuring. P.S., W.S. and A.B. did the biological analysis. F.H. performed and analysed the user study. A.K.M. and K.K. directed the research and gave initial input. All authors read and approved the final manuscript.

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Correspondence to Patrick Schramowski.

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H.S. is employed by LemnaTec GmbH.

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Extended data

Extended Data Fig. 1 Examples of XIL on MSCOCO 2014 dataset.

The left column a, presents the original images, the middle column b, presents the explanations (GRAD-CAM) after training without user feedback (default), the right column c, presents the explanations after training with user feedback (XIL) using the MSE loss between user and model explanations. Also here, light regions represent relevant regions for the model’s decision, dark regions represent irrelevant regions. As user annotations we use the complete class segmentation to illustrate that XIL can also aid in improving the explanations for non-confounded data. See the Supplementary Information for more details. Due to license issues the presented images are alternatives to the original dataset.

Extended Data Fig. 2 Example of explanations along the spatial and spectral dimensions.

GRAD-CAMS of a hyperspectral sample with spatial and spectral explanations of a corrected network. Leftmost image shows the sample followed by the corresponding spatial activations maps mapped to four different hyperspectral areas. The areas are 380-537 nm,538-695 nm, 696-853 nm and 854-1010 nm.

Extended Data Fig. 3 Mathematical intuition for the counterexample strategy, exemplified for linear classifiers.

Two data features are shown, ϕ1 and ϕ2, of which only the first is truly relevant. a, The positive example xi is not enough to disambiguate between the red and green classifiers. b, Counterexamples xi, are obtained by randomizing the irrelevant feature while keeping the label of xi. The counterexamples approximate a (local) orthogonality constraint. c, The red classifier is inconsistent with the counterexamples and eliminated. See the Methods section Explanatory Interactive Learning with counterexamples for details. (Best viewed in colour).

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Supplementary information

Supplementary Figs. 1–20, Table 1, discussion and user study example forms.

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Schramowski, P., Stammer, W., Teso, S. et al. Making deep neural networks right for the right scientific reasons by interacting with their explanations. Nat Mach Intell 2, 476–486 (2020). https://doi.org/10.1038/s42256-020-0212-3

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