Employee Testing and Selection: Legal Limits and Employer Duties

Employee testing laws require that any pre-employment assessment an employer uses be job-related, consistent with business necessity, and free of unjustified disparate impact on protected groups. That single principle sits at the center of federal law, and it applies whether the test is a written cognitive exam, a physical ability trial, a personality inventory, a background check, or an AI-driven resume screener. If a test disproportionately screens out applicants from a protected group, the burden falls on the employer, not the applicant, to prove the test measures something the job actually requires.

The Federal Statutes That Apply

Four federal laws set the outer limits of what employers can do when testing applicants, and they frequently overlap on the same hiring decision.

Title VII of the Civil Rights Act of 1964 prohibits discrimination based on race, color, religion, sex, or national origin across every aspect of employment, testing included.¹ It covers both intentional discrimination and disparate impact, meaning a neutral-looking test that disproportionately excludes a protected group can violate the statute even without any discriminatory intent. Employers may use tests, but only when those tests are not “designed, intended or used to discriminate.”²

The Americans with Disabilities Act makes it unlawful to use qualification standards, tests, or other selection criteria that screen out individuals with disabilities unless the employer can show the criteria are job-related and consistent with business necessity.³ The ADA also requires that tests be administered in a way that measures actual skills rather than the effects of a disability.

The Age Discrimination in Employment Act protects applicants aged 40 and older. A test that excludes older applicants is unlawful unless it is based on reasonable factors other than age.⁴

The Genetic Information Nondiscrimination Act bars employers from using genetic information in any employment decision and generally forbids them from requesting, requiring, or purchasing genetic information about applicants or employees. Narrow exceptions cover inadvertent acquisition and legally required genetic monitoring programs.⁵ Wellness questionnaires or medical history forms that pull in family health data during hiring can trigger GINA problems if they reach beyond those exceptions.

When a Test Crosses the Line: Adverse Impact

A test becomes legally suspect when it produces a substantially lower pass rate for a protected group than for the highest-scoring group. Federal agencies flag this using the four-fifths rule, established in the Uniform Guidelines on Employee Selection Procedures. A selection rate for any racial, sex, or ethnic group that falls below 80 percent of the rate for the highest-scoring group is generally treated as evidence of adverse impact.⁶

Say 60 percent of white applicants pass a test and 40 percent of Black applicants pass. The selection ratio is 40/60, or 67 percent. Because that falls below 80 percent, federal agencies would treat the result as evidence of adverse impact requiring further analysis.

The 80 percent figure is a screening tool, not a hard cutoff. Smaller differences can still qualify as adverse impact when they are statistically significant or when the employer’s recruiting practices have discouraged minority applicants from applying. Conversely, a ratio below 80 percent may not count if the applicant numbers are too small to be statistically reliable.⁶

Proving the Test Is Job-Related

Once adverse impact is shown, the employer must prove the test is job-related and consistent with business necessity. The Supreme Court set this framework in Griggs v. Duke Power Co., holding that “any tests used must measure the person for the job, and not the person in the abstract.”⁷ Congress codified a three-step burden-shifting process in the Civil Rights Act of 1991.¹

First, the applicant must show that a specific employment practice causes disparate impact on a protected group. Second, the employer must demonstrate the practice is job-related and consistent with business necessity. Third, even if the employer clears that bar, the applicant can still win by identifying a less discriminatory alternative that serves the employer’s legitimate needs and that the employer refuses to adopt.¹ That final step is where many employers stumble. A test can be perfectly valid and still be unlawful if a different test would accomplish the same screening with less disparate impact.

To meet the business necessity standard, an employer must be able to point to a validation study grounded in a real job analysis. The Uniform Guidelines recognize three validation strategies: criterion-related validity (statistical evidence that test scores predict job performance), content validity (evidence that the test samples the actual work), and construct validity (evidence that the test measures a defined trait tied to job behaviors).⁸ Whichever route the employer takes, the study has to start with an analysis of what the job actually requires. Skipping that step undermines everything built on top of it.

Medical Exams and Pre-Offer Restrictions

The ADA draws a hard line at the job offer. Before making a conditional offer, an employer cannot conduct a medical examination or ask whether an applicant has a disability.³ The employer can ask whether the applicant can perform specific job-related functions, but it cannot probe medical conditions or their severity.

After a conditional offer, the employer may require a medical exam and condition the offer on the results, but only if every entering employee in the same job category takes the same exam regardless of disability. Medical records from those exams must be kept in separate confidential files with limited access.³ The rule reaches beyond obvious medical checkups. Psychological tests, fitness-for-duty evaluations, and any assessment that could reveal a mental or physical health condition fall on the same side of the line.

Polygraphs

The Employee Polygraph Protection Act prohibits most private employers from requiring or even requesting that applicants or employees take a lie detector test. The ban covers polygraphs, voice stress analyzers, and similar devices.⁹ The exceptions are narrow:

Employers investigating a specific workplace incident that caused economic loss may request a polygraph from an employee reasonably suspected of involvement, provided the employee had access to the property under investigation.
Armored car, security alarm, and security guard firms may polygraph prospective employees whose duties involve protecting specified facilities or operations.
Companies authorized to manufacture or distribute controlled substances may polygraph prospective employees who would have direct access to those substances.

Violations carry civil penalties of up to $10,000 per violation, and affected employees and applicants can bring private lawsuits for reinstatement, lost wages, and attorney’s fees within a three-year statute of limitations.¹⁰

Background and Credit Checks

Background and credit checks count as selection procedures, and when an employer uses a third-party service to run them, the Fair Credit Reporting Act adds its own requirements: written disclosure and consent before pulling the report, a pre-adverse action notice with a copy of the report if the employer is considering rejecting the applicant, and a final adverse action notice explaining the decision. Skipping any of these steps is a separate violation, independent of any discrimination claim.

AI and Algorithmic Hiring Tools

Automated resume screeners, video interview analyzers, and algorithmic scoring systems are all selection procedures under existing federal law. The EEOC has said plainly that Title VII, the ADA, and other anti-discrimination statutes apply to algorithmic hiring tools the same way they apply to any other employment practice.¹¹ Programming a screener to reject candidates based on a protected characteristic is intentional discrimination. Using an algorithm that produces unjustifiable disparate impact is unlawful too, even without intent.

The ADA adds specific obligations. If an automated system does not work with an applicant’s assistive technology, the employer must provide a reasonable accommodation for that stage. An employer cannot shift ADA liability to the vendor that built the tool; the employer owns the outcomes the tool produces.¹² Employers who adopt third-party platforms without auditing them for adverse impact are exposed without knowing it.

Score Adjustments Are Prohibited

Federal law flatly prohibits adjusting test scores, using different cutoff scores, or otherwise altering test results based on race, color, religion, sex, or national origin.¹³ Sometimes called the race-norming ban, this provision was added by the Civil Rights Act of 1991. Every applicant must be evaluated against a single, uniform standard. An employer who finds adverse impact in test results cannot fix the problem by grading protected groups on a curve; the solution has to come from changing the test, the cutoff, or the process, applied to everyone equally.

Required Accommodations

The ADA requires employers to provide reasonable accommodations during testing so that results reflect the applicant’s actual abilities rather than the effects of a disability. If a test screens out a qualified candidate because of a disability rather than a genuine inability to do the job, the employer must use an accessible version or adjust the process.¹² Accommodations can include extra time, an alternative format, assistive technology, or a modified testing environment. The only limit is undue hardship on the employer.

Title VII requires employers to accommodate applicants whose sincerely held religious beliefs conflict with testing requirements, such as a test scheduled on an applicant’s Sabbath. After the Supreme Court’s 2023 decision in Groff v. DeJoy, an employer can refuse a religious accommodation only by showing the burden would be “substantial in the overall context of the employer’s business,” a significantly higher bar than the previous “more than a trivial cost” standard.¹⁴

Records the Employer Must Keep

Federal regulations require employers to retain personnel and employment records for at least one year from the date the record was made or the personnel action occurred, whichever is later. For involuntary terminations, the clock runs from the termination date. Educational institutions and state and local governments must keep these records for two years under the same rules.¹⁵

The category is broad. It covers application forms, hiring and promotion records, compensation data, selection-for-training records, test results, scoring keys, validation studies, and adverse impact analyses. Records must be kept for all applicants, not just those hired. An employer who fails to maintain adverse impact data can find federal agencies inferring adverse impact from the gap itself.

What It Costs to Get This Wrong

When the EEOC finds reasonable cause to believe testing discrimination occurred, it first tries to resolve the matter through conciliation. If that fails, the EEOC can sue in federal court. If it declines to litigate, the applicant receives a Notice of Right to Sue and has 90 days to file their own federal lawsuit.¹⁶

For intentional discrimination claims under Title VII or the ADA, compensatory and punitive damages are capped by workforce size:¹⁷

15 to 100 employees: $50,000
101 to 200 employees: $100,000
201 to 500 employees: $200,000
More than 500 employees: $300,000

Those caps apply to compensatory and punitive damages combined. They do not limit back pay, front pay, or equitable relief such as reinstatement or changes to the employer’s testing procedures. A court can also order the employer to pay attorney’s fees and court costs. For disparate impact claims, punitive damages are not available, but injunctive relief, back pay, and required policy changes are. The real cost of a testing discrimination case often runs well past the statutory cap once back pay, legal fees, and court-supervised redesign of selection procedures are added in.

1
U.S. Equal Employment Opportunity Commission. Title VII of the Civil Rights Act of 1964
2
U.S. Equal Employment Opportunity Commission. Employment Tests and Selection Procedures
3
Office of the Law Revision Counsel. 42 USC 12112 – Discrimination
4
U.S. Equal Employment Opportunity Commission. Prohibited Employment Policies/Practices
5
U.S. Equal Employment Opportunity Commission. Genetic Information Discrimination
6
eCFR. 29 CFR 1607.4 – Information on Impact
7
Justia. Griggs v. Duke Power Co., 401 U.S. 424
8
eCFR. 29 CFR Part 1607 – Uniform Guidelines on Employee Selection Procedures
9
U.S. Department of Labor. Fact Sheet 36 – Employee Polygraph Protection Act of 1988
10
Office of the Law Revision Counsel. 29 USC 2005 – Enforcement Provisions
11
U.S. Equal Employment Opportunity Commission. What is the EEOC’s Role in AI
12
U.S. Department of Justice. Algorithms, Artificial Intelligence, and Disability Discrimination in Hiring
13
Office of the Law Revision Counsel. 42 USC 2000e-2 – Unlawful Employment Practices
14
U.S. Equal Employment Opportunity Commission. Section 12 – Religious Discrimination
15
U.S. Equal Employment Opportunity Commission. Summary of Selected Recordkeeping Obligations in 29 CFR Part 1602
16
U.S. Equal Employment Opportunity Commission. What You Can Expect After a Charge is Filed
17
U.S. Equal Employment Opportunity Commission. Remedies for Employment Discrimination