Adverse Impact Formula:
80% rule for adverse impact if <80%
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The HR Adverse Impact Calculator determines whether employment practices have a disproportionately negative effect on protected groups using the 80% rule (Four-Fifths Rule) established by the Equal Employment Opportunity Commission (EEOC).
The calculator uses the adverse impact formula:
Where:
Interpretation: If the Impact Ratio is less than 80%, adverse impact is indicated according to the EEOC's Four-Fifths Rule.
Details: Adverse impact analysis helps organizations identify potentially discriminatory employment practices, ensure compliance with equal employment opportunity laws, and promote fair hiring and promotion processes.
Tips: Enter the number of selected and total applicants for both minority and majority groups. Ensure all values are positive integers and selection numbers do not exceed total applicants.
Q1: What is the 80% rule?
A: The 80% rule (Four-Fifths Rule) states that adverse impact exists if the selection rate for any protected group is less than 80% of the selection rate for the group with the highest rate.
Q2: What constitutes adverse impact?
A: Adverse impact occurs when employment practices appear neutral but have disproportionate negative effects on protected groups (race, gender, age, etc.).
Q3: Is adverse impact illegal?
A: Adverse impact itself isn't automatically illegal, but it requires employers to demonstrate that the practice is job-related and consistent with business necessity.
Q4: What should I do if adverse impact is detected?
A: Review the employment practice for job-relatedness, consider alternative practices with less adverse impact, and document the business necessity justification.
Q5: Are there statistical tests beyond the 80% rule?
A: Yes, statistical significance tests (chi-square, Fisher's exact test) and practical significance measures may provide additional insights beyond the 80% rule.