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Littérature scientifique sur le sujet « Post-hoc explainabil »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 10 mars 2023

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Articles de revues sur le sujet "Post-hoc explainabil"

Zednik, Carlos, et Hannes Boelsen. « Scientific Exploration and Explainable Artificial Intelligence ». Minds and Machines 32, n^o 1 (mars 2022) : 219–39. http://dx.doi.org/10.1007/s11023-021-09583-6.

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AbstractModels developed using machine learning are increasingly prevalent in scientific research. At the same time, these models are notoriously opaque. Explainable AI aims to mitigate the impact of opacity by rendering opaque models transparent. More than being just the solution to a problem, however, Explainable AI can also play an invaluable role in scientific exploration. This paper describes how post-hoc analytic techniques from Explainable AI can be used to refine target phenomena in medical science, to identify starting points for future investigations of (potentially) causal relationships, and to generate possible explanations of target phenomena in cognitive science. In this way, this paper describes how Explainable AI—over and above machine learning itself—contributes to the efficiency and scope of data-driven scientific research.

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Fauvel, Kevin, Tao Lin, Véronique Masson, Élisa Fromont et Alexandre Termier. « XCM : An Explainable Convolutional Neural Network for Multivariate Time Series Classification ». Mathematics 9, n^o 23 (5 décembre 2021) : 3137. http://dx.doi.org/10.3390/math9233137.

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Multivariate Time Series (MTS) classification has gained importance over the past decade with the increase in the number of temporal datasets in multiple domains. The current state-of-the-art MTS classifier is a heavyweight deep learning approach, which outperforms the second-best MTS classifier only on large datasets. Moreover, this deep learning approach cannot provide faithful explanations as it relies on post hoc model-agnostic explainability methods, which could prevent its use in numerous applications. In this paper, we present XCM, an eXplainable Convolutional neural network for MTS classification. XCM is a new compact convolutional neural network which extracts information relative to the observed variables and time directly from the input data. Thus, XCM architecture enables a good generalization ability on both large and small datasets, while allowing the full exploitation of a faithful post hoc model-specific explainability method (Gradient-weighted Class Activation Mapping) by precisely identifying the observed variables and timestamps of the input data that are important for predictions. We first show that XCM outperforms the state-of-the-art MTS classifiers on both the large and small public UEA datasets. Then, we illustrate how XCM reconciles performance and explainability on a synthetic dataset and show that XCM enables a more precise identification of the regions of the input data that are important for predictions compared to the current deep learning MTS classifier also providing faithful explainability. Finally, we present how XCM can outperform the current most accurate state-of-the-art algorithm on a real-world application while enhancing explainability by providing faithful and more informative explanations.

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Roscher, R., B. Bohn, M. F. Duarte et J. Garcke. « EXPLAIN IT TO ME – FACING REMOTE SENSING CHALLENGES IN THE BIO- AND GEOSCIENCES WITH EXPLAINABLE MACHINE LEARNING ». ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences V-3-2020 (3 août 2020) : 817–24. http://dx.doi.org/10.5194/isprs-annals-v-3-2020-817-2020.

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Abstract. For some time now, machine learning methods have been indispensable in many application areas. Especially with the recent development of efficient neural networks, these methods are increasingly used in the sciences to obtain scientific outcomes from observational or simulated data. Besides a high accuracy, a desired goal is to learn explainable models. In order to reach this goal and obtain explanation, knowledge from the respective domain is necessary, which can be integrated into the model or applied post-hoc. We discuss explainable machine learning approaches which are used to tackle common challenges in the bio- and geosciences, such as limited amount of labeled data or the provision of reliable and scientific consistent results. We show that recent advances in machine learning to enhance transparency, interpretability, and explainability are helpful in overcoming these challenges.

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Gadzinski, Gregory, et Alessio Castello. « Combining white box models, black box machines and human interventions for interpretable decision strategies ». Judgment and Decision Making 17, n^o 3 (mai 2022) : 598–627. http://dx.doi.org/10.1017/s1930297500003594.

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AbstractGranting a short-term loan is a critical decision. A great deal of research has concerned the prediction of credit default, notably through Machine Learning (ML) algorithms. However, given that their black-box nature has sometimes led to unwanted outcomes, comprehensibility in ML guided decision-making strategies has become more important. In many domains, transparency and accountability are no longer optional. In this article, instead of opposing white-box against black-box models, we use a multi-step procedure that combines the Fast and Frugal Tree (FFT) methodology of Martignon et al. (2005) and Phillips et al. (2017) with the extraction of post-hoc explainable information from ensemble ML models. New interpretable models are then built thanks to the inclusion of explainable ML outputs chosen by human intervention. Our methodology improves significantly the accuracy of the FFT predictions while preserving their explainable nature. We apply our approach to a dataset of short-term loans granted to borrowers in the UK, and show how complex machine learning can challenge simpler machines and help decision makers.

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Shen, Yifan, Li Liu, Zhihao Tang, Zongyi Chen, Guixiang Ma, Jiyan Dong, Xi Zhang, Lin Yang et Qingfeng Zheng. « Explainable Survival Analysis with Convolution-Involved Vision Transformer ». Proceedings of the AAAI Conference on Artificial Intelligence 36, n^o 2 (28 juin 2022) : 2207–15. http://dx.doi.org/10.1609/aaai.v36i2.20118.

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Image-based survival prediction models can facilitate doctors in diagnosing and treating cancer patients. With the advance of digital pathology technologies, the big whole slide images (WSIs) provide increasing resolution and more details for diagnosis. However, the gigabyte-size WSIs would make most models computationally infeasible. To this end, instead of using the complete WSIs, most of existing models only use a pre-selected subset of key patches or patch clusters as input, which might fail to completely capture the patient's tumor morphology. In this work, we aim to develop a novel survival analysis model to fully utilize the complete WSI information. We show that the use of a Vision Transformer (ViT) backbone, together with convolution operations involved in it, is an effective framework to improve the prediction performance. Additionally, we present a post-hoc explainable method to identify the most salient patches and distinct morphology features, making the model more faithful and the results easier to comprehend by human users. Evaluations on two large cancer datasets show that our proposed model is more effective and has better interpretability for survival prediction.

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Gill, Navdeep, Patrick Hall, Kim Montgomery et Nicholas Schmidt. « A Responsible Machine Learning Workflow with Focus on Interpretable Models, Post-hoc Explanation, and Discrimination Testing ». Information 11, n^o 3 (29 février 2020) : 137. http://dx.doi.org/10.3390/info11030137.

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This manuscript outlines a viable approach for training and evaluating machine learning systems for high-stakes, human-centered, or regulated applications using common Python programming tools. The accuracy and intrinsic interpretability of two types of constrained models, monotonic gradient boosting machines and explainable neural networks, a deep learning architecture well-suited for structured data, are assessed on simulated data and publicly available mortgage data. For maximum transparency and the potential generation of personalized adverse action notices, the constrained models are analyzed using post-hoc explanation techniques including plots of partial dependence and individual conditional expectation and with global and local Shapley feature importance. The constrained model predictions are also tested for disparate impact and other types of discrimination using measures with long-standing legal precedents, adverse impact ratio, marginal effect, and standardized mean difference, along with straightforward group fairness measures. By combining interpretable models, post-hoc explanations, and discrimination testing with accessible software tools, this text aims to provide a template workflow for machine learning applications that require high accuracy and interpretability and that mitigate risks of discrimination.

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Aslam, Nida, Irfan Ullah Khan, Samiha Mirza, Alanoud AlOwayed, Fatima M. Anis, Reef M. Aljuaid et Reham Baageel. « Interpretable Machine Learning Models for Malicious Domains Detection Using Explainable Artificial Intelligence (XAI) ». Sustainability 14, n^o 12 (16 juin 2022) : 7375. http://dx.doi.org/10.3390/su14127375.

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With the expansion of the internet, a major threat has emerged involving the spread of malicious domains intended by attackers to perform illegal activities aiming to target governments, violating privacy of organizations, and even manipulating everyday users. Therefore, detecting these harmful domains is necessary to combat the growing network attacks. Machine Learning (ML) models have shown significant outcomes towards the detection of malicious domains. However, the “black box” nature of the complex ML models obstructs their wide-ranging acceptance in some of the fields. The emergence of Explainable Artificial Intelligence (XAI) has successfully incorporated the interpretability and explicability in the complex models. Furthermore, the post hoc XAI model has enabled the interpretability without affecting the performance of the models. This study aimed to propose an Explainable Artificial Intelligence (XAI) model to detect malicious domains on a recent dataset containing 45,000 samples of malicious and non-malicious domains. In the current study, initially several interpretable ML models, such as Decision Tree (DT) and Naïve Bayes (NB), and black box ensemble models, such as Random Forest (RF), Extreme Gradient Boosting (XGB), AdaBoost (AB), and Cat Boost (CB) algorithms, were implemented and found that XGB outperformed the other classifiers. Furthermore, the post hoc XAI global surrogate model (Shapley additive explanations) and local surrogate LIME were used to generate the explanation of the XGB prediction. Two sets of experiments were performed; initially the model was executed using a preprocessed dataset and later with selected features using the Sequential Forward Feature selection algorithm. The results demonstrate that ML algorithms were able to distinguish benign and malicious domains with overall accuracy ranging from 0.8479 to 0.9856. The ensemble classifier XGB achieved the highest result, with an AUC and accuracy of 0.9991 and 0.9856, respectively, before the feature selection algorithm, while there was an AUC of 0.999 and accuracy of 0.9818 after the feature selection algorithm. The proposed model outperformed the benchmark study.

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Mikołajczyk, Agnieszka, Michał Grochowski et Arkadiusz Kwasigroch. « Towards Explainable Classifiers Using the Counterfactual Approach - Global Explanations for Discovering Bias in Data ». Journal of Artificial Intelligence and Soft Computing Research 11, n^o 1 (1 janvier 2021) : 51–67. http://dx.doi.org/10.2478/jaiscr-2021-0004.

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AbstractThe paper proposes summarized attribution-based post-hoc explanations for the detection and identification of bias in data. A global explanation is proposed, and a step-by-step framework on how to detect and test bias is introduced. Since removing unwanted bias is often a complicated and tremendous task, it is automatically inserted, instead. Then, the bias is evaluated with the proposed counterfactual approach. The obtained results are validated on a sample skin lesion dataset. Using the proposed method, a number of possible bias-causing artifacts are successfully identified and confirmed in dermoscopy images. In particular, it is confirmed that black frames have a strong influence on Convolutional Neural Network’s prediction: 22% of them changed the prediction from benign to malignant.

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Kumar, Akshi, Shubham Dikshit et Victor Hugo C. Albuquerque. « Explainable Artificial Intelligence for Sarcasm Detection in Dialogues ». Wireless Communications and Mobile Computing 2021 (2 juillet 2021) : 1–13. http://dx.doi.org/10.1155/2021/2939334.

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Sarcasm detection in dialogues has been gaining popularity among natural language processing (NLP) researchers with the increased use of conversational threads on social media. Capturing the knowledge of the domain of discourse, context propagation during the course of dialogue, and situational context and tone of the speaker are some important features to train the machine learning models for detecting sarcasm in real time. As situational comedies vibrantly represent human mannerism and behaviour in everyday real-life situations, this research demonstrates the use of an ensemble supervised learning algorithm to detect sarcasm in the benchmark dialogue dataset, MUStARD. The punch-line utterance and its associated context are taken as features to train the eXtreme Gradient Boosting (XGBoost) method. The primary goal is to predict sarcasm in each utterance of the speaker using the chronological nature of a scene. Further, it is vital to prevent model bias and help decision makers understand how to use the models in the right way. Therefore, as a twin goal of this research, we make the learning model used for conversational sarcasm detection interpretable. This is done using two post hoc interpretability approaches, Local Interpretable Model-agnostic Explanations (LIME) and Shapley Additive exPlanations (SHAP), to generate explanations for the output of a trained classifier. The classification results clearly depict the importance of capturing the intersentence context to detect sarcasm in conversational threads. The interpretability methods show the words (features) that influence the decision of the model the most and help the user understand how the model is making the decision for detecting sarcasm in dialogues.

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Knapič, Samanta, Avleen Malhi, Rohit Saluja et Kary Främling. « Explainable Artificial Intelligence for Human Decision Support System in the Medical Domain ». Machine Learning and Knowledge Extraction 3, n^o 3 (19 septembre 2021) : 740–70. http://dx.doi.org/10.3390/make3030037.

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In this paper, we present the potential of Explainable Artificial Intelligence methods for decision support in medical image analysis scenarios. Using three types of explainable methods applied to the same medical image data set, we aimed to improve the comprehensibility of the decisions provided by the Convolutional Neural Network (CNN). In vivo gastral images obtained by a video capsule endoscopy (VCE) were the subject of visual explanations, with the goal of increasing health professionals’ trust in black-box predictions. We implemented two post hoc interpretable machine learning methods, called Local Interpretable Model-Agnostic Explanations (LIME) and SHapley Additive exPlanations (SHAP), and an alternative explanation approach, the Contextual Importance and Utility (CIU) method. The produced explanations were assessed by human evaluation. We conducted three user studies based on explanations provided by LIME, SHAP and CIU. Users from different non-medical backgrounds carried out a series of tests in a web-based survey setting and stated their experience and understanding of the given explanations. Three user groups (n = 20, 20, 20) with three distinct forms of explanations were quantitatively analyzed. We found that, as hypothesized, the CIU-explainable method performed better than both LIME and SHAP methods in terms of improving support for human decision-making and being more transparent and thus understandable to users. Additionally, CIU outperformed LIME and SHAP by generating explanations more rapidly. Our findings suggest that there are notable differences in human decision-making between various explanation support settings. In line with that, we present three potential explainable methods that, with future improvements in implementation, can be generalized to different medical data sets and can provide effective decision support to medical experts.

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Plus de sources

Thèses sur le sujet "Post-hoc explainabil"

SEVESO, ANDREA. « Symbolic Reasoning for Contrastive Explanations ». Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/404830.

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La necessità di spiegazioni sui sistemi di Machine Learning (ML) sta crescendo man mano che i nuovi modelli superano in performance i loro predecessori, diventando più complessi e meno comprensibili per gli utenti finali. Un passaggio essenziale nella ricerca in ambito eXplainable Artificial Intelligence (XAI) è la creazione di modelli interpretabili che mirano ad approssimare la funzione decisionale di un algoritmo black box. Sebbene negli ultimi anni siano stati proposti diversi metodi di XAI, non è stata prestata sufficiente attenzione alla spiegazione di come i modelli modificano il loro comportamento in contrasto con altre versioni (ad esempio, a causa di nuovi addestramenti dei modelli o modifica dei dati sottostanti). In questi casi, un sistema XAI dovrebbe spiegare perché il modello cambia le sue previsioni sui risultati passati. In diverse situazioni pratiche, i decisori umani si confrontano con più di un modello di apprendimento automatico. Di conseguenza, sta crescendo l'importanza di capire come funzionano due modelli di Machine Learning al di là delle loro performance predittive, per comprendere il loro comportamento, le loro differenze e la loro somiglianza. Ad oggi, i modelli interpretabili sono sintetizzati per spiegare i cosiddetti modelli black-box e le loro previsioni, e possono essere utili per rappresentare formalmente e misurare le differenze nel comportamento del modello ri-addestrato nel trattare dati nuovi e diversi. Catturare e comprendere tali differenze è fondamentale, poiché la necessità di fiducia è fondamentale in qualsiasi applicazione a supporto dei processi decisionali umani-IA. Questa è l'idea di ContrXT, un nuovo approccio che (i) traccia i criteri decisionali di un classificatore black box codificando i cambiamenti nella logica decisionale attraverso Binary Decision Diagrams. Quindi (ii) fornisce spiegazioni globali, agnostici dalla tipologia di modello, Model-Contrastive (M-contrast) in linguaggio naturale, stimando perché -e in quale misura- il modello ha modificato il suo comportamento nel tempo. Abbiamo implementato e valutato questo approccio su diversi modelli ML supervisionati addestrati su set di dati di benchmark e un'applicazione reale, dimostrando che è efficace nel rilevare classi notevolmente modificate e nello spiegare la loro variazione attraverso un user study. L'approccio è stato implementato ed è disponibile per la comunità sia come pacchetto Python che tramite API REST, fornendo contrastive explanations as a service.
The need for explanations of Machine Learning (ML) systems is growing as new models outperform their predecessors while becoming more complex and less comprehensible for their end-users. An essential step in eXplainable Artificial Intelligence (XAI) research is to create interpretable models that aim at approximating the decision function of a black box algorithm. Though several XAI methods have been proposed in recent years, not enough attention was paid to explaining how models change their behaviour in contrast with other versions (e.g., due to retraining or data shifts). In such cases, an XAI system should explain why the model changes its predictions concerning past outcomes. In several practical situations, human decision-makers deal with more than one machine learning model. Consequently, the importance of understanding how two machine learning models work beyond their prediction performances is growing, to understand their behavior, their differences, and their likeness. To date, interpretable models are synthesised for explaining black boxes and their predictions and can be beneficial for formally representing and measuring the differences in the retrained model's behaviour in dealing with new and different data. Capturing and understanding such differences is crucial, as the need for trust is key in any application to support human-Artificial Intelligence (AI) decision-making processes. This is the idea of ContrXT, a novel approach that (i) traces the decision criteria of a black box classifier by encoding the changes in the decision logic through Binary Decision Diagrams. Then (ii) it provides global, model-agnostic, Model-Contrastive (M-contrast) explanations in natural language, estimating why -and to what extent- the model has modified its behaviour over time. We implemented and evaluated this approach over several supervised ML models trained on benchmark datasets and a real-life application, showing it is effective in catching majorly changed classes and in explaining their variation through a user study. The approach has been implemented, and it is available to the community both as a python package and through REST API, providing contrastive explanations as a service.

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Chapitres de livres sur le sujet "Post-hoc explainabil"

Kamath, Uday, et John Liu. « Post-Hoc Interpretability and Explanations ». Dans Explainable Artificial Intelligence : An Introduction to Interpretable Machine Learning, 167–216. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-83356-5_5.

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Deshpande, Saurabh, Rahee Walambe, Ketan Kotecha et Marina Marjanović Jakovljević. « Post-hoc Explainable Reinforcement Learning Using Probabilistic Graphical Models ». Dans Communications in Computer and Information Science, 362–76. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-95502-1_28.

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Cánovas-Segura, Bernardo, Antonio Morales, Antonio López Martínez-Carrasco, Manuel Campos, Jose M. Juarez, Lucía López Rodríguez et Francisco Palacios. « Exploring Antimicrobial Resistance Prediction Using Post-hoc Interpretable Methods ». Dans Artificial Intelligence in Medicine : Knowledge Representation and Transparent and Explainable Systems, 93–107. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-37446-4_8.

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Stevens, Alexander, Johannes De Smedt et Jari Peeperkorn. « Quantifying Explainability in Outcome-Oriented Predictive Process Monitoring ». Dans Lecture Notes in Business Information Processing, 194–206. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98581-3_15.

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AbstractThe growing interest in applying machine and deep learning algorithms in an Outcome-Oriented Predictive Process Monitoring (OOPPM) context has recently fuelled a shift to use models from the explainable artificial intelligence (XAI) paradigm, a field of study focused on creating explainability techniques on top of AI models in order to legitimize the predictions made. Nonetheless, most classification models are evaluated primarily on a performance level, where XAI requires striking a balance between either simple models (e.g. linear regression) or models using complex inference structures (e.g. neural networks) with post-processing to calculate feature importance. In this paper, a comprehensive overview of predictive models with varying intrinsic complexity are measured based on explainability with model-agnostic quantitative evaluation metrics. To this end, explainability is designed as a symbiosis between interpretability and faithfulness and thereby allowing to compare inherently created explanations (e.g. decision tree rules) with post-hoc explainability techniques (e.g. Shapley values) on top of AI models. Moreover, two improved versions of the logistic regression model capable of capturing non-linear interactions and both inherently generating their own explanations are proposed in the OOPPM context. These models are benchmarked with two common state-of-the-art models with post-hoc explanation techniques in the explainability-performance space.

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Actes de conférences sur le sujet "Post-hoc explainabil"

Xu, Kerui, Jun Xu, Sheng Gao, Si Li, Jun Guo et Ji-Rong Wen. « A Tag-Based Post-Hoc Framework for Explainable Conversational Recommendation ». Dans ICTIR '22 : The 2022 ACM SIGIR International Conference on the Theory of Information Retrieval. New York, NY, USA : ACM, 2022. http://dx.doi.org/10.1145/3539813.3545120.

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Čyras, Kristijonas, Antonio Rago, Emanuele Albini, Pietro Baroni et Francesca Toni. « Argumentative XAI : A Survey ». Dans Thirtieth International Joint Conference on Artificial Intelligence {IJCAI-21}. California : International Joint Conferences on Artificial Intelligence Organization, 2021. http://dx.doi.org/10.24963/ijcai.2021/600.

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Explainable AI (XAI) has been investigated for decades and, together with AI itself, has witnessed unprecedented growth in recent years. Among various approaches to XAI, argumentative models have been advocated in both the AI and social science literature, as their dialectical nature appears to match some basic desirable features of the explanation activity. In this survey we overview XAI approaches built using methods from the field of computational argumentation, leveraging its wide array of reasoning abstractions and explanation delivery methods. We overview the literature focusing on different types of explanation (intrinsic and post-hoc), different models with which argumentation-based explanations are deployed, different forms of delivery, and different argumentation frameworks they use. We also lay out a roadmap for future work.

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Sattarzadeh, Sam, Mahesh Sudhakar et Konstantinos N. Plataniotis. « SVEA : A Small-scale Benchmark for Validating the Usability of Post-hoc Explainable AI Solutions in Image and Signal Recognition ». Dans 2021 IEEE/CVF International Conference on Computer Vision Workshops (ICCVW). IEEE, 2021. http://dx.doi.org/10.1109/iccvw54120.2021.00462.

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