Causality in Machine Learning: Innovating Model Generalization through Inference of Causal Relationships from Observational Data
Swapnil Morandé, Veena Tewari · Qeios · 2023
Extracting causal mechanisms from observational data represents a paradigm shift for machine learning, unlocking more robust generalization capabilities. This quantitative study investigates techniques to infer directed causal graphs from diverse datasets using constraint-based, score-based, and neural structure learning algorithms. Results demonstrate score-based methods for recovering meaningful causal relationships from complex, high-dimensional data across domains including healthcare, finance, and computer vision. The inferred causal graphs exhibit explanatory power and invariance, containing domain-general insights unavailable from statistical correlations alone. Integrating discovered causal relationships shows significant potential to enhance model generalization and accuracy by facilitating accurate extrapolation, increased robustness to distribution shifts, transfer learning, and interpretability. However, performance remains contingent on domain knowledge and dataset biases. Further innovation in causal discovery and rigorous evaluation of generalization improvements is imperative. Overall, equipping machine learning with causal reasoning abilities allows more reliable, adaptable, and trustworthy systems. This research crystallizes the imperative and concrete path toward assimilating causal inference into machine learning. Limitations exist, necessitating ethical and responsible integration. Nonetheless, by elucidating initial integrating techniques, this pioneering study illuminates promising frontiers at the intersection of causality and machine learning toward more powerful intelligible systems.