Predictive Faithfulness
Learn to evaluate the predictive faithfulness of an explanation using the Prediction Gap on Important feature perturbation (PGI) metric.
We'll cover the following
Predictive faithfulness measures the faithfulness of a post-hoc explanation in the absence of a ground-truth explanation. Prediction Gap on Important feature perturbation (PGI) is a popular predictive faithfulness metric that measures the difference in the prediction probability that results from perturbing the Top-k influential features of the given post-hoc explanation.
In other words, given a post-hoc explanation
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