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Home DisruptiveTECH

Gamaliel Okotie: Explainable AI and Interpretable Machine Learning

by Staff Writer
October 7, 2024
in DisruptiveTECH
0
Explainable AI by Gamaliel Okotie
Gamaliel Okotie

Gamaliel Okotie

UBA
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The rapid advancements in artificial intelligence and machine learning have transformed industries, but with this progress comes the urgent desire for transparency and accountability.

AI models regularly operate as black boxes, making decisions without lucid visibility into the reasoning behind them.

This opacity raises cogent concerns, especially in sectors like healthcare, finance, and legal services, where having the proper knowledge behind an AI’s decision is as pivotal as the decision itself.

Gamaliel Okotie, a senior data scientist with deep expertise in Explainable AI  and Interpretable Machine Learning provides  a profound exploration of the methods designed to break open these black boxes, assisting  stakeholders trust and rely on AI’s decisions with confidence.

The key to making AI more interpretable lies in balancing model complexity with transparency. As machine learning models expand in sophistication, often integrating several variables or vast neural networks makes decisions become difficult to explain.

Gamaliel identifies these difficulties and emphasises that interpretability is not just a technical requirement but a fundamental need to ensure ethical and responsible AI. He discusses further into various techniques that have emerged to bridge this gap.

One such method is model simplification, which focuses on scaling algorithms that are inherently interpretable.

Simple models such as decision trees, linear regressions, and rule-based systems are made less difficult  to understand because their decisions can be identified step by step.

However, the trade-off often lies in their predictive performance. Complex models such as deep neural networks and ensemble methods tend to bring better accuracy, but at the cost of transparency. Gamaliel highlights how efforts in explainable AI are not only about reverting to simpler models but about augmenting complex models with extra layers of interpretability.

This leads to the discussion of post-hoc interpretability techniques, which Gamaliel explains are used after a model has been trained to provide explanations without altering the underlying algorithm.

Methods such Local Interpretable Model-Agnostic Explanations and SHapley Additive exPlanations have gained recognition  in this specialty.

LIME works by approximating complex models locally, offering insights into how specific predictions are made based on little variations in input data.

SHAP, on the other hand, is built on game theory, assigning values to each feature based on its contribution to a required prediction. Gamaliel undercovers the strengths and limitations of these tools, underscoring their role in providing actionable explanations while still maintaining the predictive power of complex models.

Another pivotal area Gamaliel addresses is feature attribution. In several machine learning models, features, whether they are customer demographics in a marketing campaign or patient metrics in a clinical setting are the solid foundation of decisions.

Methods such as permutation importance and partial dependence plots are valuable tools in understanding how individual features influence model outcomes.

Gamaliel Okotie illustrates that by focusing on feature importance, data scientists and business stakeholders can obtain clear insights into which variables drive decisions and adjust them if required.

This clarity fosters trust among users, whether they are data scientists, regulators, or end consumers.

Beyond technical methods, Gamaliel discusses further about the societal implications of explainability in AI.

Having confidence in machine learning models extends beyond understanding the decisions themselves, it goes beyond ensuring fairness, addressing bias, and ensuring accountability.

In  industries that are regulated such as healthcare and finance where an AI decision can influence an individual’s access to services or quality of care, it is pivotal that the decision-making process be fully transparent and fair.

Bias detection tools and fairness metrics are crucial  to achieving this goal. By identifying and addressing potential biases within datasets or models, data scientists can ensure that AI systems operate in a manner that is both equitable and fair.

Gamaliel’s techniques to Explainable AI also integrates a user-centred perspective. He acknowledges that different stakeholders require different levels of explanation.

While a data scientist may need a highly technical breakdown of how a neural network arrived at its decision, a business executive may require a more straightforward explanation that depicts key contributing factors without overwhelming them with technical jargon.

Developing explainable systems, therefore, needs a thoughtful consideration of the audience, a point which is often overlooked but is crucial in ensuring AI’s success in real-world applications.

The regulatory environment encompassing AI is also transcending, with expanding calls for explainability in automated decision-making systems. Gamaliel discusses compliance with regulations such as GDPR.

In Europe,   individuals’ right to explanation regarding decisions made by automated systems has further pushed explainability to the front seat of AI development. In fields where these laws apply, organisations must ensure their AI systems are not only high-performing but also interpretable, have the ability of being audited, and fair about their decision-making processes.

Gamaliel Okotie’s insight into Explainable AI and Interpretable Machine Learning discuss further on the role these concepts play in making sure AI systems are trustworthy and transparent.

By leveraging methodologies such as post-hoc interpretability tools, feature attribution methods, and bias detection frameworks, data scientists can shine light on the inner workings of even the most complex AI models.

Gamaliel Okotie stresses further, the ultimate goal of explainability is not only to make AI more fair  but to foster a deeper knowledge that ensures AI can be safely incorporated into critical decision-making processes in today’s world.

Through a mixture of technical acumen and a commitment to ethical AI development, Gamaliel showcases how explainability is the bedrock of building AI systems that are not just powerful, but responsible.

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Tags: explainable AIGamaliel Okotiemachine learning
Staff Writer

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