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Impact score evaluation metric
Last updated: Feb 21, 2025
Impact score evaluation metric

The impact score evaluation metric compares the rate that monitored groups are selected to receive favorable outcomes to the rate that reference groups are selected to receive favorable outcomes.

Metric details

Impact score is a fairness evaluation metric that can help determine whether your asset produces biased outcomes.

Scope

The impact score metric evaluates generative AI assets and machine learning models.

  • Types of AI assets:
    • Prompt templates
    • Machine learning models
  • Generative AI tasks: Text classification
  • Machine learning problem type: Binary classification

Scores and values

The impact score metric score indicates whether monitored groups receive higher rates of selection than reference groups. Higher scores indicate higher selection rates for monitored groups.

  • Range of values: 0.0-1.0
  • Best possible score: 0.0

Settings

  • Thresholds:
    • Lower limit: 0.8
    • Upper limit: 1.0

Do the math

The following formula calculates the selection rate for each group:

selection rate formula is displayed

The following formula calculates the impact score:

impact score formula is displayed

Parent topic: Evaluation metrics