Ground-Truth Faithfulness—Rank Correlation

Learn to evaluate the ground-truth faithfulness of an explanation using the rank correlation metric.

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The rank correlation is a metric that computes Spearman’s rank correlation coefficient to measure the agreement between feature rankings provided by a given post-hoc explanation and the corresponding ground-truth explanation. In other words, given a post-hoc explanation SS and the ground-truth explanation SgS_g, the rank correlation RA(S,Sg)RA(S, S_g) can be expressed as follows:

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