Tabular diffusion counterfactual explanations

Area of Science:

• Machine Learning
• Artificial Intelligence
• Data Science

Background:

• Counterfactual explanations are crucial for interpretable machine learning.
• Current diffusion model explanations primarily target computer vision, not tabular data.
• Tabular data is prevalent in finance and social sciences.

Purpose of the Study:

• To develop a novel counterfactual explanation method for tabular data.
• To adapt diffusion models for categorical features using Gumbel-softmax approximations.
• To analyze the impact of temperature parameter on explanation quality.

Main Methods:

• Proposed a guided reverse process for categorical features.
• Utilized an approximation to the Gumbel-softmax distribution.
• Conducted experiments on large-scale credit lending and tabular datasets.

Main Results:

• The novel approach demonstrated superior performance over baseline methods.
• Achieved robust and realistic counterfactual explanations.
• Evaluated using quantitative measures of interpretability, diversity, instability, and validity.

Conclusions:

• The proposed method offers an effective solution for counterfactual explanations on tabular data.
• This work extends the application of diffusion models to new data domains.
• The findings contribute to more interpretable AI in finance and social sciences.