2022

The four-fifths rule is not disparate impact: a woeful tale of epistemic trespassing in algorithmic fairness

Watkins, Elizabeth Anne, McKenna, Michael, Chen, Jiahao

Understand

Computer scientists are trained to create abstractions that simplify and generalize.

  • However, a premature abstraction that omits crucial contextual details creates the risk of epistemic trespassing, by falsely asserting its relevance into other contexts.
  • We study how the field of responsible AI has created an imperfect synecdoche by abstracting the four-fifths rule (a.k.a.
  • the 4/5 rule or 80% rule), a single part of disparate impact discrimination law, into the disparate impact metric.

Reading the bibliography…